{"id":2393,"date":"2026-04-13T08:49:21","date_gmt":"2026-04-13T00:49:21","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2393"},"modified":"2026-04-13T08:49:25","modified_gmt":"2026-04-13T00:49:25","slug":"how-are-the-accuracy-grades-of-granite-measuring-tools-classified","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/ar\/2026\/04\/13\/how-are-the-accuracy-grades-of-granite-measuring-tools-classified\/","title":{"rendered":"\u0643\u064a\u0641 \u064a\u062a\u0645 \u062a\u0635\u0646\u064a\u0641 \u062f\u0631\u062c\u0627\u062a \u062f\u0642\u0629 \u0623\u062f\u0648\u0627\u062a \u0642\u064a\u0627\u0633 \u0627\u0644\u062c\u0631\u0627\u0646\u064a\u062a\u061f"},"content":{"rendered":"<p>\u062a\u0635\u0646\u064a\u0641 \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062f\u0642\u0629 \u0644\u0623\u062f\u0648\u0627\u062a \u0642\u064a\u0627\u0633 \u0627\u0644\u062c\u0631\u0627\u0646\u064a\u062a (\u0627\u0644\u0635\u062e\u0648\u0631)\u060c \u0627\u0633\u062a\u0646\u0627\u062f\u064b\u0627 \u0641\u064a \u0627\u0644\u0645\u0642\u0627\u0645 \u0627\u0644\u0623\u0648\u0644 \u0625\u0644\u0649 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0648\u0637\u0646\u064a GB\/T 20428-2006 \u201c\u0623\u0644\u0648\u0627\u062d \u0627\u0644\u0635\u062e\u0648\u0631\u201d (\u0627\u0644\u062f\u0631\u062c\u0627\u062a \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629 \u0647\u064a \u0627\u0644\u062f\u0631\u062c\u0629 000 \u064800 \u06480 \u06481\u061b \u0648\u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0642\u062f\u064a\u0645 GB 4987-85 \u0647\u0648 \u0646\u0641\u0633\u0647 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 GB 4987-85). \u0627\u0644\u0645\u0624\u0634\u0631 \u0627\u0644\u0623\u0633\u0627\u0633\u064a \u0647\u0648 \u0627\u0644\u062a\u0633\u0637\u064a\u062d\u060c \u0645\u0639 \u062d\u0633\u0627\u0628 \u0627\u0644\u062a\u0641\u0627\u0648\u062a\u0627\u062a \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647\u0627 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633 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\u0627\u0644\u0645\u0639\u0627\u064a\u0631\u0629 \u0648\u0627\u0644\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0628\u0635\u0631\u064a\u0629\/\u0623\u0634\u0628\u0627\u0647 \u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a<br>\u0645\u0639\u0627\u062f\u0644\u0629 \u0627\u0644\u062a\u0633\u0637\u064a\u062d: 1 \u00d7 (1 \u062f\/1000) \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631 (\u062f = \u0645\u0645 \u0642\u0637\u0631\u064a)<br>\u0645\u062b\u0627\u0644: 300 \u00d7 300 \u0645\u0645 \u2190 1.5 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\u061b 1000 \u00d7 1000 \u0645\u0645 \u2190 2.5 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631<br>\u0627\u0644\u062f\u0631\u062c\u0629 00 (\u062f\u0631\u062c\u0629 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062f\u0642\u064a\u0642)<br>\u0623\u062c\u0647\u0632\u0629 CMM\u060c \u0648\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0631\u0624\u064a\u0629\u060c \u0648\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062f\u0642\u064a\u0642<br>\u0627\u0644\u0635\u064a\u063a\u0629: 2 \u00d7 (1 \u062f\/1000) \u03bcm<br>\u0645\u062b\u0627\u0644: 300\u00d7300 \u2192 \u22643 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\u061b 1000\u00d71000 \u2192 \u22645 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631<br>\u0627\u0644\u062f\u0631\u062c\u0629 0 (\u062f\u0631\u062c\u0629 \u0627\u0644\u062a\u0641\u062a\u064a\u0634 \u0627\u0644\u0639\u0627\u0645)<br>\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062f\u0642\u064a\u0642 \u0644\u0644\u0648\u0631\u0634\u0629 \u0648\u0627\u0644\u0623\u062f\u0648\u0627\u062a \u0648\u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0627\u062a \u0627\u0644\u062f\u0642\u064a\u0642\u0629<br>\u0627\u0644\u0635\u064a\u063a\u0629: 4 \u00d7 (1 \u062f\/1000) \u03bcm<br>\u0645\u062b\u0627\u0644: 1000\u00d71000 \u2192 \u22647 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631<br>\u0627\u0644\u062f\u0631\u062c\u0629 1 (\u0641\u062d\u0635 \u0639\u0627\u062f\u064a\/\u0641\u062d\u0635 \u062e\u0634\u0646)<br>\u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a \u0648\u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062a\u062c\u0645\u064a\u0639\u064a \u0627\u0644\u0639\u0627\u0645<br>\u0627\u0644\u0635\u064a\u063a\u0629: 8 \u00d7 (1 \u062f\/1000) \u03bcm<br>\u0645\u062b\u0627\u0644: 1000\u00d71000 \u2192 \u226414 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631<\/p>\n\n\n\n<p>II. \u062c\u062f\u0648\u0644 \u0645\u0631\u062c\u0639\u064a \u0633\u0631\u064a\u0639 \u0644\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629 (\u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\u060c 20 \u2103)<br>\u0627\u0644\u062c\u062f\u0648\u0644<br>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a (\u0645\u0645) \u062f\u0631\u062c\u0629 000 \u062f\u0631\u062c\u0629 000 \u062f\u0631\u062c\u0629 00 \u062f\u0631\u062c\u0629 0 \u062f\u0631\u062c\u0629 1<br>300\u00d7300 1.5 3 6 12<br>500\u00d7500 2 4 8 16<br>1000\u00d71000 2.5 5 10 20<br>1500\u00d71000 3 6 12 24<br>2000\u00d71500 4 8 16 32<\/p>\n\n\n\n<p>\u062b\u0627\u0644\u062b\u0627\u064b. \u0645\u0624\u0634\u0631\u0627\u062a \u0627\u0644\u062f\u0642\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0627\u0644\u0623\u062e\u0631\u0649<br>\u062e\u0634\u0648\u0646\u0629 \u0627\u0644\u0633\u0637\u062d: \u0633\u0637\u062d \u0627\u0644\u0639\u0645\u0644 Ra\u22640.02 ~ 0.02 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631 (\u062f\u0631\u062c\u0629 000\/00)<br>\u0627\u0644\u0627\u0633\u062a\u0642\u0627\u0645\u0629 (\u0627\u0644\u062d\u0627\u0641\u0629 \u0627\u0644\u0645\u0633\u062a\u0642\u064a\u0645\u0629): \u062f\u0631\u062c\u0629 00 \u22641 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\/\u0645\u062a\u0631\u060c \u062f\u0631\u062c\u0629 0 \u22642 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\/\u0645\u062a\u0631<br>\u062a\u0639\u0627\u0645\u062f (\u0632\u0627\u0648\u064a\u0629 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CMMs\u060c \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062f\u0642\u064a\u0642\u060c \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062f\u0642\u064a\u0642\u060c \u0627\u0644\u0641\u0636\u0627\u0621 \u0627\u0644\u062c\u0648\u064a<br>\u0627\u0644\u062f\u0631\u062c\u0629 0: \u0641\u062d\u0635 \u0627\u0644\u062c\u0648\u062f\u0629 \u0641\u064a \u0627\u0644\u0648\u0631\u0634\u0629\u060c \u0648\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0623\u062f\u0648\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u0627\u0644\u062f\u0642\u064a\u0642<br>\u0627\u0644\u0635\u0641 1: \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062a\u0642\u0631\u064a\u0628\u064a\u060c \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u062a\u0642\u0631\u064a\u0628\u064a\u060c \u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u0627\u0644\u0639\u0627\u0645<\/p>\n\n\n\n<p>V. \u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u0639 \u0627\u0644\u0645\u0646\u0635\u0627\u062a \u0627\u0644\u0645\u0639\u062f\u0646\u064a\u0629<br>\u062c\u0631\u0627\u0646\u064a\u062a \u0645\u0633\u062a\u0642\u0631 \u0628\u062f\u0631\u062c\u0629 000\/00\u060c \u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u062a\u063a\u064a\u0631\u0627\u062a \u0641\u064a \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u062a\u0622\u0643\u0644\u060c \u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623<br>\u0627\u0644\u062d\u062f\u064a\u062f \u0627\u0644\u0632\u0647\u0631 \/ \u0627\u0644\u0641\u0648\u0644\u0627\u0630: \u0623\u0639\u0644\u0649 \u062f\u0631\u062c\u0629 \u0645\u0646 0 ~ 1\u060c \u064a\u062a\u0623\u062b\u0631 \u0628\u0633\u0647\u0648\u0644\u0629 \u0628\u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0648\u0627\u0644\u0627\u0647\u062a\u0632\u0627\u0632 \u0648\u0627\u0644\u0635\u062f\u0623<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img alt=\"\" fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-768x1024.jpg\" class=\"wp-image-2223\" srcset=\"https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-768x1024.jpg 768w, https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-225x300.jpg 225w, https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-1152x1536.jpg 1152w, https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-9x12.jpg 9w, https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25-800x1066.jpg 800w, https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260326091841_38_25.jpg 1280w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Classification of Accuracy Grades for Granite (Rock) Measuring Tools, based primarily on National Standard GB\/T 20428-2006 &#8220;Rock Slabs&#8221; (mainstream grades are Grade 000, 00, 0, and 1; the old standard GB 4987-85 is the same). The core indicator is flatness, with tolerances calculated based on dimensions and diagonal length. I. Grades and Core Definitions (National&#8230;<\/p>","protected":false},"author":1,"featured_media":2396,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_analysis_target_kw":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/04\/\u5fae\u4fe1\u56fe\u7247_20260407144906_14_11.jpg",738,721,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/ar\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":242,"filter":"raw","cat_ID":35,"category_count":242,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/comments?post=2393"}],"version-history":[{"count":2,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2393\/revisions"}],"predecessor-version":[{"id":2398,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2393\/revisions\/2398"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media\/2396"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media?parent=2393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/categories?post=2393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/tags?post=2393"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}