{"id":6292,"date":"2024-10-31T07:16:00","date_gmt":"2024-10-31T07:16:00","guid":{"rendered":"https:\/\/jinsuncarbon.com\/?p=6292"},"modified":"2024-11-06T03:05:54","modified_gmt":"2024-11-06T03:05:54","slug":"graphite-extrude","status":"publish","type":"post","link":"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/","title":{"rendered":"Guide du graphite extrud\u00e9 : Tout ce qu'il faut savoir"},"content":{"rendered":"<p>Le graphite extrud\u00e9, mat\u00e9riau \u00e9mergent \u00e0 hautes performances, s'est impos\u00e9 dans de nombreux domaines industriels gr\u00e2ce \u00e0 ses propri\u00e9t\u00e9s uniques et \u00e0 sa large applicabilit\u00e9, et est devenu une force avec laquelle il faut compter.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#%E2%85%A0_Overview_of_extruded_graphite\" >\u2160. Aper\u00e7u du graphite extrud\u00e9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#%E2%85%A1_Characteristics_of_graphite_products\" >\u2161. Caract\u00e9ristiques des produits en graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#III_Production_process_of_extruded_graphite\" >III. Processus de production du graphite extrud\u00e9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#IV_Fields_of_Application\" >IV. Domaines d'application<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#V_Comparison_with_different_graphite_production_method\" >V. Comparaison avec diff\u00e9rentes m\u00e9thodes de production de graphite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#%E2%85%A5Correct_methods_to_use_extruded_graphite_products\" >M\u00e9thodes correctes d'utilisation des produits en graphite extrud\u00e9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/jinsuncarbon.com\/fr\/graphite-extrude\/#VII_Future_development_potential_in_modern_industry\" >VII. Potentiel de d\u00e9veloppement futur dans l'industrie moderne.<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"%E2%85%A0_Overview_of_extruded_graphite\"><\/span>\u2160. Aper\u00e7u du graphite extrud\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Le graphite extrud\u00e9 est produit par un processus d'extrusion dans lequel un m\u00e9lange de graphite et de liant est forc\u00e9 \u00e0 travers un moule pour former la forme d\u00e9sir\u00e9e.<\/p>\n<p>La m\u00e9thode d'extrusion est une production semi-continue. Apr\u00e8s l'ajout d'une certaine quantit\u00e9 de p\u00e2te, plusieurs produits (<a href=\"https:\/\/jinsuncarbon.com\/fr\/produit-2\/tige-de-graphite\/\">tige de graphite<\/a>Le rendement de production de la m\u00e9thode d'extrusion est donc beaucoup plus \u00e9lev\u00e9 que celui de la m\u00e9thode du film de compression.<\/p>\n<p>&nbsp;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-6295 aligncenter\" src=\"https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod.jpeg\" alt=\"Tige en graphite extrud\u00e9\" width=\"666\" height=\"375\" srcset=\"https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod.jpeg 1536w, https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod-300x169.jpeg 300w, https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod-1024x576.jpeg 1024w, https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod-768x432.jpeg 768w, https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod-18x10.jpeg 18w, https:\/\/jinsuncarbon.com\/wp-content\/uploads\/2024\/10\/Extruded-Graphite-Rod-600x338.jpeg 600w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E2%85%A1_Characteristics_of_graphite_products\"><\/span>\u2161. Caract\u00e9ristiques des produits en graphite<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong><b> Bonne adsorption.<\/b><\/strong><\/li>\n<\/ol>\n<p>La structure creuse du carbone lui conf\u00e8re une bonne capacit\u00e9 d'adsorption. Il est donc souvent utilis\u00e9 comme mat\u00e9riau d'adsorption pour l'absorption de l'humidit\u00e9, des odeurs, etc.<\/p>\n<ol start=\"2\">\n<li><strong><b> Bonne conductivit\u00e9 thermique, transfert de chaleur rapide, chauffage uniforme et \u00e9conomie de carburant.<\/b><\/strong><\/li>\n<\/ol>\n<p>Les plaques de cuisson et les casseroles en graphite chauffent rapidement et les aliments cuits sont chauff\u00e9s uniform\u00e9ment de l'int\u00e9rieur comme de l'ext\u00e9rieur. En outre, le temps de chauffage est plus court, le go\u00fbt reste pur et les \u00e9l\u00e9ments nutritifs d'origine des aliments sont conserv\u00e9s.<\/p>\n<ol start=\"3\">\n<li><strong><b> Stabilit\u00e9 chimique.<\/b><\/strong><\/li>\n<\/ol>\n<p>Le graphite, qui pr\u00e9sente une bonne stabilit\u00e9 chimique \u00e0 temp\u00e9rature ambiante, ne peut pas \u00eatre corrod\u00e9 par un acide fort, un alcali fort ou un solvant organique. Par cons\u00e9quent, m\u00eame en cas d'utilisation prolong\u00e9e, la perte de graphite peut \u00eatre tr\u00e8s faible, et il suffit de le frotter et de le nettoyer.<\/p>\n<h2><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"III_Production_process_of_extruded_graphite\"><\/span>III. Processus de production du graphite extrud\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>- Pr\u00e9paration du mat\u00e9riel :<\/b><\/strong>\u00a0s\u00e9lectionner des mati\u00e8res premi\u00e8res, telles que la poudre de graphite naturel, le coke d'asphalte, le goudron de houille, etc.<\/p>\n<p><strong><b>- Pr\u00e9traitement :<\/b><\/strong>\u00a0broyage, m\u00e9lange, pr\u00e9-oxydation ou modification chimique.<\/p>\n<p><strong><b>- M\u00e9lange et pressage :<\/b><\/strong>\u00a0m\u00e9langer et presser uniform\u00e9ment les mat\u00e9riaux trait\u00e9s sous haute pression \u00e0 l'aide d'un \u00e9quipement sp\u00e9cial pour former le premier embryon.<\/p>\n<p><strong><b>- Solidification par frittage :<\/b><\/strong>\u00a0le frittage de l'embryon primaire dans un environnement \u00e0 haute temp\u00e9rature pour stabiliser sa structure.<\/p>\n<p><strong><b>- Post-traitement : <\/b><\/strong>le d\u00e9coupage, le per\u00e7age et d'autres \u00e9tapes de transformation pour obtenir la forme et la taille souhait\u00e9es du produit.<\/p>\n<h2><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"IV_Fields_of_Application\"><\/span>IV. Domaines d'application<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>\u00a0- \u00c9lectronique :<\/b><\/strong>\u00a0comme mat\u00e9riau d'isolation thermique dans la fabrication des semi-conducteurs.<\/p>\n<p><strong><b>\u00a0\u00a0- L'industrie de l'\u00e9nergie :<\/b><\/strong>\u00a0mod\u00e9rateurs de neutrons pour les r\u00e9acteurs nucl\u00e9aires, mat\u00e9riaux pour batteries.<\/p>\n<p><strong><b>- Industrie m\u00e9tallurgique :<\/b><\/strong>\u00a0moules en graphite, creusets.<\/p>\n<p><strong><b>- Industrie chimique :<\/b><\/strong>\u00a0composants r\u00e9sistants \u00e0 la corrosion, supports de catalyseurs.<\/p>\n<p>&#8211;<strong><b>\u00a0Pinceaux :<\/b><\/strong>\u00a0Utilis\u00e9 dans les moteurs, les g\u00e9n\u00e9rateurs et d'autres \u00e9quipements, comme pi\u00e8ces conductrices et de friction, avec une bonne r\u00e9sistance \u00e0 l'usure et une bonne conductivit\u00e9.<\/p>\n<p><strong><b>\u00a0- Autres :<\/b><\/strong>\u00a0l'a\u00e9rospatiale, les exp\u00e9riences de recherche scientifique, etc.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"V_Comparison_with_different_graphite_production_method\"><\/span>V. Comparaison avec diff\u00e9rentes m\u00e9thodes de production de graphite<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Graphite press\u00e9 isostatiquement :<\/strong><\/p>\n<p>Avantages : isotrope, haute r\u00e9sistance, haute densit\u00e9, haute puret\u00e9 et autres caract\u00e9ristiques.<\/p>\n<p>Sc\u00e9narios d'application :<\/p>\n<p>Industrie des semi-conducteurs : utilis\u00e9e pour fabriquer des composants de champ thermique de four \u00e0 cristal unique, tels que le graphite. <a href=\"https:\/\/jinsuncarbon.com\/fr\/produit-2\/creuset-en-graphite\/\">creusets<\/a>qui peuvent r\u00e9sister \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es et \u00e0 un environnement de vide pouss\u00e9 afin de garantir la qualit\u00e9 de la croissance des cristaux.<\/p>\n<p>Industrie solaire photovolta\u00efque : comme mat\u00e9riau de champ thermique pour les fours \u00e0 lingots de polysilicium, am\u00e9liorant la qualit\u00e9 et l'efficacit\u00e9 des lingots.<\/p>\n<p>EDM : la conductivit\u00e9 \u00e9lev\u00e9e et la bonne usinabilit\u00e9 des <a href=\"https:\/\/en.wikipedia.org\/wiki\/Isostasy\" target=\"_blank\" rel=\"noopener\">isostatiquement<\/a> Le graphite press\u00e9 convient \u00e0 la fabrication d'\u00e9lectrodes EDM pour l'usinage de moules et de pi\u00e8ces de haute pr\u00e9cision.<\/p>\n<p><strong><b>Graphite moul\u00e9 :<\/b><\/strong><\/p>\n<p>Avantages : possibilit\u00e9 de produire des formes complexes et une grande pr\u00e9cision dimensionnelle.<\/p>\n<p>Sc\u00e9narios d'application :<\/p>\n<p>Domaine des garnitures m\u00e9caniques : fabrication de toutes sortes de bagues d'\u00e9tanch\u00e9it\u00e9 m\u00e9caniques, telles que les bagues d'\u00e9tanch\u00e9it\u00e9 de pompes, les bagues d'\u00e9tanch\u00e9it\u00e9 de compresseurs, etc., qui peuvent fonctionner \u00e0 grande vitesse, \u00e0 haute pression et dans d'autres conditions difficiles avec de bonnes performances d'\u00e9tanch\u00e9it\u00e9.<\/p>\n<p>Piles \u00e0 combustible : Les plaques bipolaires sont utilis\u00e9es pour fabriquer des piles \u00e0 combustible. Leur bonne conductivit\u00e9 et leur r\u00e9sistance \u00e0 la corrosion permettent d'am\u00e9liorer les performances et la dur\u00e9e de vie des piles \u00e0 combustible.<\/p>\n<p><strong><b>Graphite synth\u00e9tique :<\/b><\/strong><\/p>\n<p>Avantages : ajustement des propri\u00e9t\u00e9s en fonction des besoins, tels que la duret\u00e9, la r\u00e9sistance \u00e0 l'usure, la conductivit\u00e9, etc.<\/p>\n<p>Sc\u00e9narios d'application :<\/p>\n<p>Pile au lithium : En tant que <a href=\"https:\/\/jinsuncarbon.com\/fr\/produit-2\/bloc-de-carbone-anodique\/\">anode<\/a> mat\u00e9riau de la batterie au lithium, il pr\u00e9sente des performances de cycle et une capacit\u00e9 sp\u00e9cifique \u00e9lev\u00e9es.  Cela signifie qu'il peut am\u00e9liorer la densit\u00e9 \u00e9nerg\u00e9tique et la dur\u00e9e de vie de la batterie.<\/p>\n<p>Lubrifiants : Le faible coefficient de frottement du graphite synth\u00e9tique lui permet d'\u00eatre utilis\u00e9 comme lubrifiant de haute performance dans l'a\u00e9rospatiale, l'automobile et d'autres applications pour r\u00e9duire le frottement et l'usure.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E2%85%A5Correct_methods_to_use_extruded_graphite_products\"><\/span>M\u00e9thodes correctes d'utilisation des produits en graphite extrud\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong><b> Contr\u00f4le des conditions environnementales<\/b><\/strong><\/li>\n<\/ol>\n<p>- Temp\u00e9rature : La plupart des graphites extrud\u00e9s peuvent rester stables dans des environnements sans oxyg\u00e8ne jusqu'\u00e0 3000\u00b0C, mais dans les environnements oxyg\u00e9n\u00e9s, les temp\u00e9ratures de fonctionnement sup\u00e9rieures \u00e0 400\u00b0C doivent \u00eatre \u00e9vit\u00e9es pour \u00e9viter l'oxydation.<\/p>\n<p>- Milieux corrosifs : Certaines solutions acido-basiques et certains compos\u00e9s halog\u00e9n\u00e9s peuvent attaquer le graphite. V\u00e9rifier la compatibilit\u00e9 des produits avant utilisation.<\/p>\n<p>- Humidit\u00e9 : Bien que le graphite soit r\u00e9sistant \u00e0 l'humidit\u00e9, celle-ci peut affecter les propri\u00e9t\u00e9s \u00e9lectriques et doit \u00eatre conserv\u00e9e au sec lors du stockage.<\/p>\n<ol start=\"2\">\n<li><strong><b> Traitement et installation<\/b><\/strong><\/li>\n<\/ol>\n<p>- Des outils non ferreux devraient \u00eatre utilis\u00e9s pour le d\u00e9coupage, le per\u00e7age, etc. afin d'\u00e9viter l'introduction d'impuret\u00e9s.<\/p>\n<p>- Manipuler avec pr\u00e9caution lors de l'installation pour \u00e9viter les fissures caus\u00e9es par les chocs ou la gravit\u00e9.<\/p>\n<ol start=\"3\">\n<li><strong><b> Nettoyage et entretien<\/b><\/strong><\/li>\n<\/ol>\n<p>- Utilisez un chiffon ou une brosse douce pour enlever la poussi\u00e8re de la surface et \u00e9vitez de la rayer avec des outils de nettoyage durs.<\/p>\n<p>- Inspecter r\u00e9guli\u00e8rement pour d\u00e9tecter les signes d'usure ou de d\u00e9t\u00e9rioration, et remplacer les pi\u00e8ces vieillissantes ou endommag\u00e9es en temps utile.<\/p>\n<ol start=\"4\">\n<li><strong><b> Mesures de s\u00e9curit\u00e9<\/b><\/strong><\/li>\n<\/ol>\n<p>- En cas d'utilisation en contact avec des pi\u00e8ces conductrices de courant, s'assurer d'une bonne connexion afin d'\u00e9viter toute surcharge de courant.<\/p>\n<p>- Portez un \u00e9quipement de protection individuelle appropri\u00e9 lors de l'utilisation, en particulier lorsque vous travaillez dans des environnements chauds ou avec des gaz dangereux.<\/p>\n<ol start=\"5\">\n<li><strong><b> Recommandations en mati\u00e8re de stockage<\/b><\/strong><\/li>\n<\/ol>\n<p>- Conserver dans un endroit frais et sec, \u00e0 l'abri des produits chimiques et des sources de chaleur directe.<\/p>\n<p>- Si vous ne l'utilisez pas pendant une longue p\u00e9riode, veuillez utiliser un emballage r\u00e9sistant \u00e0 l'humidit\u00e9 afin de r\u00e9duire l'impact des facteurs environnementaux.<\/p>\n<ol start=\"6\">\n<li><strong><b> Pr\u00e9cautions<\/b><\/strong><\/li>\n<\/ol>\n<p>- Bien que le graphite lui-m\u00eame ne soit pas inflammable, une combustion spontan\u00e9e peut se produire dans certaines conditions. Il s'agit par exemple d'\u00e9tincelles produites par un frottement \u00e0 grande vitesse ou d'une exposition prolong\u00e9e \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es dans un environnement riche en oxyg\u00e8ne.<\/p>\n<p>- Ne pas stocker ou utiliser dans un environnement humide ou contenant de fortes propri\u00e9t\u00e9s oxydantes, ce qui pourrait acc\u00e9l\u00e9rer l'oxydation ou poser des probl\u00e8mes de s\u00e9curit\u00e9.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"VII_Future_development_potential_in_modern_industry\"><\/span>VII. Potentiel de d\u00e9veloppement futur dans l'industrie moderne.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Actuellement, le graphite extrud\u00e9 est non seulement am\u00e9lior\u00e9 en termes de densit\u00e9 et de r\u00e9sistance, mais aussi optimis\u00e9 en termes de r\u00e9sistance \u00e0 la corrosion et de stabilit\u00e9 thermique. Il continuera \u00e0 progresser pour r\u00e9pondre aux nouveaux besoins du march\u00e9.<\/p>\n<p>\u00c0 l'avenir, le d\u00e9veloppement du graphite extrud\u00e9 sera davantage ax\u00e9 sur l'innovation technologique et l'\u00e9largissement des domaines d'application. Avec l'augmentation de la demande de mat\u00e9riaux en graphite de haute puret\u00e9 dans l'industrie des semi-conducteurs, le graphite extrud\u00e9 se concentrera davantage sur l'am\u00e9lioration de sa puret\u00e9 et de sa pr\u00e9cision de traitement. Sur le plan technique, l'accent sera mis sur l'am\u00e9lioration de la conductivit\u00e9 thermique et de la r\u00e9sistance m\u00e9canique du graphite extrud\u00e9, par exemple gr\u00e2ce au d\u00e9veloppement de nouveaux mat\u00e9riaux composites pour am\u00e9liorer ses propri\u00e9t\u00e9s. En outre, avec la progression des objectifs de d\u00e9veloppement durable, la production et l'application du graphite extrud\u00e9 accorderont une plus grande attention \u00e0 l'utilisation de mat\u00e9riaux et \u00e0 une conception respectueux de l'environnement. Dans le m\u00eame temps, cela permet de r\u00e9duire la consommation d'\u00e9nergie et les \u00e9missions de d\u00e9chets dans le processus de production.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Extruded graphite, as an emerging high-performance material, has emerged in many industrial fields with its unique properties and wide applicability, and has become a force to be reckoned with. \u2160. Overview of extruded graphite Extruded graphite is produced through an extrusion process in which a mixture of graphite and binder is forced through a mold [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":6294,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6292","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-carbon-graphite"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v19.2.1 (Yoast SEO v25.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Extruded Graphite Guide: Everything You Need To Know<\/title>\n<meta name=\"description\" content=\"Extruded graphite is produced through an extrusion process in which a mixture of graphite and binder is forced through a mold to form the desired shape.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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