{"id":1729,"date":"2026-04-20T10:18:00","date_gmt":"2026-04-20T10:18:00","guid":{"rendered":"https:\/\/lzbmetal.com\/?p=1729"},"modified":"2026-04-20T05:32:58","modified_gmt":"2026-04-20T05:32:58","slug":"%d8%a7%d9%84%d9%83%d9%88%d8%af-%d8%a7%d9%84%d9%87%d9%86%d8%af%d8%b3%d9%8a-%d9%84%d8%a3%d8%a8%d8%b9%d8%a7%d8%af-%d8%a3%d8%ba%d8%b7%d9%8a%d8%a9-%d9%81%d8%aa%d8%ad%d8%a7%d8%aa-%d8%a7%d9%84%d8%b5%d8%b1","status":"publish","type":"post","link":"https:\/\/lzbmetal.com\/ar\/%d8%a7%d9%84%d9%83%d9%88%d8%af-%d8%a7%d9%84%d9%87%d9%86%d8%af%d8%b3%d9%8a-%d9%84%d8%a3%d8%a8%d8%b9%d8%a7%d8%af-%d8%a3%d8%ba%d8%b7%d9%8a%d8%a9-%d9%81%d8%aa%d8%ad%d8%a7%d8%aa-%d8%a7%d9%84%d8%b5%d8%b1\/","title":{"rendered":"\u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0644\u0623\u0628\u0639\u0627\u062f \u0623\u063a\u0637\u064a\u0629 \u063a\u0631\u0641 \u0627\u0644\u062a\u0641\u062a\u064a\u0634: \u0645\u0646 \u0627\u0644\u062a\u0648\u062d\u064a\u062f \u0627\u0644\u0642\u064a\u0627\u0633\u064a \u0625\u0644\u0649 \u0627\u0644\u062a\u0643\u064a\u0641 \u0627\u0644\u062f\u0642\u064a\u0642 \u0644\u0634\u0631\u0643\u0629 LZB Metal"},"content":{"rendered":"

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\u062e\u0627\u0645\u0633\u0627\u064b: \u062a\u063a\u0637\u064a\u0629 \u0643\u0627\u0645\u0644\u0629 \u0644\u0644\u0645\u0634\u0647\u062f \u0648\u0625\u0645\u0643\u0627\u0646\u064a\u0629 \u0627\u0644\u062a\u062e\u0635\u064a\u0635<\/h3>\n\n\n\n
\n
\"\"<\/figure>\n<\/div><\/figure>\n\n\n\n

\u062a\u062a\u0645\u064a\u0632 \u0645\u0646\u062a\u062c\u0627\u062a \u0634\u0631\u0643\u0629 LZB Metal \u0628\u0646\u0637\u0627\u0642 \u0623\u0628\u0639\u0627\u062f \u0648\u0627\u0633\u0639 \u0644\u0644\u063a\u0627\u064a\u0629\u060c \u064a\u063a\u0637\u064a \u0645\u0639\u0638\u0645 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0641\u064a \u0627\u0644\u0633\u0648\u0642:<\/p>\n\n\n\n

    \n
  • - \u0633\u0644\u0633\u0644\u0629 \u062f\u0627\u0626\u0631\u064a\u0629: \u03a6450 \u0645\u0645\u060c \u03a6600 \u0645\u0645\u060c \u03a6700 \u0645\u0645\u060c \u03a6800 \u0645\u0645\u060c \u03a6900 \u0645\u0645\u060c \u03a61000 \u0645\u0645\u060c \u03a61200 \u0645\u0645\u060c \u0625\u0644\u062e.<\/li>\n\n\n\n
  • - \u0633\u0644\u0633\u0644\u0629 \u0627\u0644\u0645\u0631\u0628\u0639\u0627\u062a: 300\u00d7300 \u0645\u0645\u060c 400\u00d7400 \u0645\u0645\u060c 450\u00d7450 \u0645\u0645\u060c 500\u00d7500 \u0645\u0645\u060c 600\u00d7600 \u0645\u0645\u060c 800\u00d7800 \u0645\u0645\u060c \u0625\u0644\u062e.<\/li>\n\n\n\n
  • - \u0633\u0644\u0633\u0644\u0629 \u0645\u0633\u062a\u0637\u064a\u0644\u0629: 450\u00d7600 \u0645\u0645\u060c 450\u00d7900 \u0645\u0645\u060c 600\u00d7900 \u0645\u0645\u060c 700\u00d7800 \u0645\u0645\u060c 700\u00d7900 \u0645\u0645\u060c 800\u00d7900 \u0645\u0645\u060c 900\u00d71000 \u0645\u0645\u060c \u0625\u0644\u062e.<\/li>\n\n\n\n
  • - \u0623\u0628\u0639\u0627\u062f \u062e\u0627\u0635\u0629: \u0623\u063a\u0637\u064a\u0629 \u0648\u0635\u0648\u0644 \u0643\u0628\u064a\u0631\u0629 1140\u00d71140 \u0645\u0645\u060c \u0625\u0637\u0627\u0631 \u062e\u0627\u0631\u062c\u064a \u0645\u0631\u0628\u0639 \u0645\u0639 \u0647\u064a\u0627\u0643\u0644 \u062f\u0627\u062e\u0644\u064a\u0629 \u062f\u0627\u0626\u0631\u064a\u0629 (\u0645\u062b\u0644 700\u00d7800)\u060c \u0625\u0644\u062e.<\/li>\n<\/ul>\n\n\n\n

    \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0645\u0634\u0627\u0631\u064a\u0639 \u063a\u064a\u0631 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629\u060c \u064a\u0645\u0643\u0646 \u0644\u0634\u0631\u0643\u0629 LZB Metal \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0639\u0644\u0649 \u0645\u0646\u0635\u0629 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u062b\u0644\u0627\u062b\u064a\u0629 \u0627\u0644\u0623\u0628\u0639\u0627\u062f \u0648\u062e\u0637\u0648\u0637 \u0627\u0644\u0625\u0646\u062a\u0627\u062c \u0627\u0644\u0645\u0631\u0646\u0629 \u0644\u0625\u0643\u0645\u0627\u0644 \u062a\u0641\u0627\u0635\u064a\u0644 \u0627\u0644\u0631\u0633\u0645 \u0641\u064a \u063a\u0636\u0648\u0646 48 \u0633\u0627\u0639\u0629 \u0648\u0628\u062f\u0621 \u0627\u0644\u0625\u0646\u062a\u0627\u062c \u0627\u0644\u0645\u062e\u0635\u0635 \u0641\u064a \u063a\u0636\u0648\u0646 72 \u0633\u0627\u0639\u0629\u060c \u0644\u062a\u0644\u0628\u064a\u0629 \u0645\u062e\u062a\u0644\u0641 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0627\u0644\u062e\u0627\u0635\u0629.<\/p>\n\n\n\n

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    \n
    \"\"<\/figure>\n<\/div><\/figure>\n\n\n\n
      \n
    • - \u0648\u0627\u062c\u0647\u0629 \u0634\u0628\u0643\u0629 \u0645\u0646\u0639 \u0627\u0644\u0633\u0642\u0648\u0637: \u062c\u0645\u064a\u0639 \u0627\u0644\u0623\u063a\u0637\u064a\u0629 \u0630\u0627\u062a \u0627\u0644\u0641\u062a\u062d\u0629 \u0627\u0644\u0648\u0627\u0636\u062d\u0629 \u2265 600 \u0645\u0645 \u0645\u064f\u062c\u0647\u0632\u0629 \u0645\u0633\u0628\u0642\u064b\u0627 \u0628\u0645\u0648\u0627\u0642\u0639 \u062a\u0631\u0643\u064a\u0628 \u062e\u0637\u0627\u0641\u0627\u062a \u0634\u0628\u0643\u0629 \u0645\u0646\u0639 \u0627\u0644\u0633\u0642\u0648\u0637\u060c \u0648\u0647\u064a \u0642\u0627\u062f\u0631\u0629 \u0639\u0644\u0649 \u0627\u0633\u062a\u064a\u0639\u0627\u0628 \u0634\u0628\u0643\u0627\u062a \u0645\u0646\u0639 \u0627\u0644\u0633\u0642\u0648\u0637 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u0642\u0648\u0629 \u0628\u0633\u0639\u0629 \u062a\u062d\u0645\u064a\u0644 \u2265 1000 \u0643\u062c\u0645<\/li>\n\n\n\n
    • - \u062d\u062c\u0631\u0629 \u0645\u0631\u0627\u0642\u0628\u0629 \u0630\u0643\u064a\u0629: \u062a\u0645 \u062a\u062e\u0635\u064a\u0635 \u062d\u062c\u0631\u0627\u062a \u0627\u0633\u062a\u0634\u0639\u0627\u0631 \u0642\u064a\u0627\u0633\u064a\u0629 \u062f\u0627\u062e\u0644 \u0647\u064a\u0643\u0644 \u0627\u0644\u063a\u0637\u0627\u0621\u060c \u0642\u0627\u062f\u0631\u0629 \u0639\u0644\u0649 \u062f\u0645\u062c \u0648\u062d\u062f\u0627\u062a \u0645\u0631\u0627\u0642\u0628\u0629 \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0645\u062d\u0627\u0648\u0631 \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0625\u062c\u0647\u0627\u062f \u0627\u0644\u062f\u0642\u064a\u0642\u060c \u0648\u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0645\u0627\u0621\u060c \u0648\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0648\u063a\u064a\u0631\u0647\u0627 \u0645\u0646 \u0648\u062d\u062f\u0627\u062a \u0627\u0644\u0645\u0631\u0627\u0642\u0628\u0629.<\/li>\n\n\n\n
    • - \u0646\u0638\u0627\u0645 \u0642\u0641\u0644 \u0645\u0636\u0627\u062f \u0644\u0644\u0633\u0631\u0642\u0629: \u062a\u0645 \u062f\u0645\u062c \u0627\u0644\u0645\u0641\u0635\u0644\u0627\u062a \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629 \u0627\u0644\u0645\u062b\u0628\u062a\u0629 \u0648\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0642\u0641\u0644 \u0627\u0644\u062e\u0627\u0635\u0629 \u0645\u0639 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0623\u0628\u0639\u0627\u062f\u060c \u0645\u0645\u0627 \u064a\u0636\u0645\u0646 \u0639\u062f\u0645 \u0648\u062c\u0648\u062f \u0645\u062b\u0628\u062a\u0627\u062a \u0638\u0627\u0647\u0631\u0629.<\/li>\n\n\n\n
    • - \u0623\u0646\u0645\u0627\u0637 \u0645\u0627\u0646\u0639\u0629 \u0644\u0644\u0627\u0646\u0632\u0644\u0627\u0642: \u062a\u062a\u0631\u0627\u0648\u062d \u0623\u0639\u0645\u0627\u0642 \u0623\u0646\u0645\u0627\u0637 \u0645\u0646\u0639 \u0627\u0644\u0627\u0646\u0632\u0644\u0627\u0642 \u0639\u0644\u0649 \u0627\u0644\u0633\u0637\u062d \u0645\u0646 3 \u0625\u0644\u0649 10 \u0645\u0645\u060c \u0648\u0647\u064a \u0645\u064f\u062d\u0633\u064e\u0651\u0646\u0629 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0628\u064f\u0639\u062f\u064a\u0629 \u0644\u0636\u0645\u0627\u0646 \u0623\u062f\u0627\u0621 \u0645\u0648\u062d\u062f \u0644\u0645\u0646\u0639 \u0627\u0644\u0627\u0646\u0632\u0644\u0627\u0642 \u0648\u0643\u0641\u0627\u0621\u0629 \u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u064a\u0627\u0647.<\/li>\n<\/ul>\n\n\n\n

      \u0627\u0644\u062e\u0644\u0627\u0635\u0629: \u0627\u0644\u0641\u0644\u0633\u0641\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0648\u0631\u0627\u0621 \u0627\u0644\u0623\u0628\u0639\u0627\u062f<\/h3>\n\n\n\n

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      In modern urban infrastructure, the dimensions of a manhole cover are never arbitrary numbers but an engineering result of the comprehensive interplay between standardization systems, load ratings, installation environments, and maintenance requirements. According to European Standard EN124 and Chinese National Standard GB\/T 23858, the dimensional design of manhole covers must meet three core requirements: first, […]<\/p>\n","protected":false},"author":2,"featured_media":1731,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[126,153,63],"class_list":["post-1729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-ductile-cast-iron","tag-lzb-metal","tag-manhole-cover"],"yoast_head":"\nThe Engineering Code of Manhole Cover Dimensions: From Standardization to LZB Metal's Precision Adaptation News - LZBMetal Products Co., Ltd<\/title>\n<meta name=\"description\" content=\"The dimensions of a manhole cover have never been isolated geometric numbers. They are an engineering expression resulting from the combined effects of material science, structural mechanics, manufacturing processes, and application scenarios. Through systematic technological innovation, LZB Metal has elevated dimensional design from simple "specification compliance" to "precision adaptation," establishing a full-scene, stricter-than-national-standards, customizable dimensional system.For municipal managers, choosing LZB Metal means selecting not just products that meet standard dimensional parameters, but a complete engineering solution, validated under extreme conditions, centered on optimizing life-cycle value. Whether for rapid delivery of standard specifications or customized development of non-standard projects, LZB Metal provides precisely calculated dimensional designs and indisputable reliability assurance. This is the core of LZB Metal's product superiority over ordinary manufacturers in the dimension of dimensional design.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lzbmetal.com\/ar\/\u0627\u0644\u0643\u0648\u062f-\u0627\u0644\u0647\u0646\u062f\u0633\u064a-\u0644\u0623\u0628\u0639\u0627\u062f-\u0623\u063a\u0637\u064a\u0629-\u0641\u062a\u062d\u0627\u062a-\u0627\u0644\u0635\u0631\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Engineering Code of Manhole Cover Dimensions: From Standardization to LZB Metal's Precision Adaptation News - LZBMetal Products Co., Ltd\" \/>\n<meta property=\"og:description\" content=\"The dimensions of a manhole cover have never been isolated geometric numbers. They are an engineering expression resulting from the combined effects of material science, structural mechanics, manufacturing processes, and application scenarios. Through systematic technological innovation, LZB Metal has elevated dimensional design from simple "specification compliance" to "precision adaptation," establishing a full-scene, stricter-than-national-standards, customizable dimensional system.For municipal managers, choosing LZB Metal means selecting not just products that meet standard dimensional parameters, but a complete engineering solution, validated under extreme conditions, centered on optimizing life-cycle value. Whether for rapid delivery of standard specifications or customized development of non-standard projects, LZB Metal provides precisely calculated dimensional designs and indisputable reliability assurance. This is the core of LZB Metal's product superiority over ordinary manufacturers in the dimension of dimensional design.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lzbmetal.com\/ar\/\u0627\u0644\u0643\u0648\u062f-\u0627\u0644\u0647\u0646\u062f\u0633\u064a-\u0644\u0623\u0628\u0639\u0627\u062f-\u0623\u063a\u0637\u064a\u0629-\u0641\u062a\u062d\u0627\u062a-\u0627\u0644\u0635\u0631\/\" \/>\n<meta property=\"og:site_name\" content=\"LZBMetal Products Co., Ltd\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-20T10:18:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lzbmetal.com\/wp-content\/uploads\/2026\/04\/\u5fae\u4fe1\u56fe\u7247_20250418154410-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1920\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"luzhongbao\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Levi_Luzhongbao\" \/>\n<meta name=\"twitter:label1\" content=\"\u0643\u064f\u062a\u0628 \u0628\u0648\u0627\u0633\u0637\u0629\" \/>\n\t<meta name=\"twitter:data1\" content=\"luzhongbao\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u0648\u0642\u062a \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0645\u064f\u0642\u062f\u0651\u0631\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u062f\u0642\u0627\u0626\u0642\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/\"},\"author\":{\"name\":\"luzhongbao\",\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#\\\/schema\\\/person\\\/03225aba1019488054ecea53728c5cf0\"},\"headline\":\"The Engineering Code of Manhole Cover Dimensions: From Standardization to LZB Metal's Precision Adaptation\",\"datePublished\":\"2026-04-20T10:18:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/\"},\"wordCount\":1115,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/lzbmetal.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/\u5fae\u4fe1\u56fe\u7247_20250418154410-scaled.jpg\",\"keywords\":[\"Ductile Cast Iron\",\"LZB Metal\",\"Manhole Cover\"],\"articleSection\":[\"News\"],\"inLanguage\":\"ar\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/\",\"url\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/\",\"name\":\"The Engineering Code of Manhole Cover Dimensions: From Standardization to LZB Metal's Precision Adaptation News - LZBMetal Products Co., Ltd\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/the-engineering-code-of-manhole-cover-dimensions-from-standardization-to-lzb-metals-precision-adaptation\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/lzbmetal.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/\u5fae\u4fe1\u56fe\u7247_20250418154410-scaled.jpg\",\"datePublished\":\"2026-04-20T10:18:00+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#\\\/schema\\\/person\\\/03225aba1019488054ecea53728c5cf0\"},\"description\":\"The dimensions of a manhole cover have never been isolated geometric numbers. 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