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\u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0648\u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0645\u062e\u0632\u0648\u0646 \u0627\u0644\u064a\u0648\u0645\u064a\u0629\u060c \u0628\u0645\u0627 \u064a\u062a\u0645\u0627\u0634\u0649 \u0645\u0639 \u062a\u0648\u062c\u0647\u0627\u062a \u062a\u0637\u0648\u064a\u0631 \u0627\u0644\u0645\u062f\u0646 \u0627\u0644\u0630\u0643\u064a\u0629.<\/p>\n\n\n\n<p>\u064a\u064f\u0631\u0633\u064a \u063a\u0637\u0627\u0621 \u0641\u062a\u062d\u0629 \u0627\u0644\u062a\u0641\u062a\u064a\u0634 \u0627\u0644\u0645\u0639\u062f\u0646\u064a lzbmetal 700\u00d7800\u00d7120 \u0627\u0644\u0645\u0632\u0648\u062f \u0628\u0634\u0628\u0643\u0629 \u0645\u0627\u0646\u0639\u0629 \u0644\u0644\u0633\u0642\u0648\u0637\u060c \u0628\u0641\u0636\u0644 \u0645\u0632\u0627\u064a\u0627\u0647 \u0627\u0644\u0634\u0627\u0645\u0644\u0629 \u0641\u064a \u0627\u0644\u0645\u0648\u0627\u062f \u0648\u0627\u0644\u0647\u064a\u0643\u0644 \u0648\u0627\u0644\u062a\u0635\u0646\u064a\u0639 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\u0627\u0644\u0645\u0646\u062a\u062c \u0628\u062f\u0642\u0629 \u0639\u0627\u0644\u064a\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u062d\u062f\u064a\u062f \u0645\u0637\u0627\u0648\u0639 \u0639\u0627\u0644\u064a \u0627\u0644\u0642\u0648\u0629 \u0645\u0646 \u0627\u0644\u062f\u0631\u062c\u0629 QT500-7\u060c \u0648\u064a\u062a\u0648\u0627\u0641\u0642 \u062a\u0645\u0627\u0645\u064b\u0627 \u0645\u0639 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0648\u0637\u0646\u064a GB\/T23858 \u0648\u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062f\u0648\u0644\u064a EN124. 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This product is precision-cast using QT500-7 grade high-strength ductile iron, strictly adhering to the GB\/T23858 national standard and the EN124 international standard. Its unique square outer frame with circular inner core structure (external 700mm \u00d7 800mm rectangular frame, internally adapting to a standard circular manhole opening) meets the coverage requirements of large manholes while providing a larger load dispersion area. The 120mm ultra-deep frame, combined with a bottom extended flange design, directly transmits wheel loads to the road structural layers, fundamentally addressing the industry-wide issue of asphalt settlement around the manhole from a structural principle perspective. The built-in high-strength nylon anti-falling net (load-bearing capacity \u2265 1000 kg) provides double protection, preventing accidental human falls, making it particularly suitable for places with extremely high public safety requirements such as school campuses, plazas, and sidewalks.\" \/>\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\/\u0625\u0637\u0627\u0631-\u062e\u0627\u0631\u062c\u064a-\u0645\u0631\u0628\u0639-\u0644\u0648\u0632\u0647\u0648\u0646\u063a\u0628\u0627\u0648-700x800x120-\u0645\u0639-\u0634\u0628\u0643\u0629-\u062f\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Luzhongbao 700x800x120 Square Outer Frame with Circular Inner Core &amp; Anti-Falling Net - Outside Square Inside Round Manhole Cover - Hubei Luzhongbao Metal Products Co., Ltd\" \/>\n<meta property=\"og:description\" content=\"The Luzhongbao 700\u00d7800\u00d7120 square outer frame with circular inner core manhole cover, equipped with an anti-falling net, is a heavy-duty protective facility specifically designed for modern urban areas with high safety standards. This product is precision-cast using QT500-7 grade high-strength ductile iron, strictly adhering to the GB\/T23858 national standard and the EN124 international standard. Its unique square outer frame with circular inner core structure (external 700mm \u00d7 800mm rectangular frame, internally adapting to a standard circular manhole opening) meets the coverage requirements of large manholes while providing a larger load dispersion area. The 120mm ultra-deep frame, combined with a bottom extended flange design, directly transmits wheel loads to the road structural layers, fundamentally addressing the industry-wide issue of asphalt settlement around the manhole from a structural principle perspective. The built-in high-strength nylon anti-falling net (load-bearing capacity \u2265 1000 kg) provides double protection, preventing accidental human falls, making it particularly suitable for places with extremely high public safety requirements such as school campuses, plazas, and sidewalks.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lzbmetal.com\/ar\/\u0625\u0637\u0627\u0631-\u062e\u0627\u0631\u062c\u064a-\u0645\u0631\u0628\u0639-\u0644\u0648\u0632\u0647\u0648\u0646\u063a\u0628\u0627\u0648-700x800x120-\u0645\u0639-\u0634\u0628\u0643\u0629-\u062f\/\" \/>\n<meta property=\"og:site_name\" content=\"LZBMetal Products Co., Ltd\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-05T15:48:00+00:00\" \/>\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=\"5 \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\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/\"},\"author\":{\"name\":\"luzhongbao\",\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#\\\/schema\\\/person\\\/03225aba1019488054ecea53728c5cf0\"},\"headline\":\"lzbmetal 700x800x120 Square Outer Frame with Circular Inner Core &amp; Anti-Falling Net\",\"datePublished\":\"2025-11-05T15:48:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/\"},\"wordCount\":1027,\"commentCount\":0,\"keywords\":[\"Luzhongbao\",\"Manhole Cover\"],\"articleSection\":[\"Ductile Cast Iron Products\",\"Outside Square Inside Round Manhole Cover\",\"Products\",\"Square Manhole Cover\"],\"inLanguage\":\"ar\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/lzbmetal.com\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/\",\"url\":\"https:\\\/\\\/lzbmetal.com\\\/luzhongbao-700x800x120-square-outer-frame-with-circular-inner-core-anti-falling-net\\\/\",\"name\":\"Luzhongbao 700x800x120 Square Outer Frame with Circular Inner Core & Anti-Falling Net - Outside Square Inside Round Manhole Cover - Hubei Luzhongbao Metal Products Co., Ltd\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#website\"},\"datePublished\":\"2025-11-05T15:48:00+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/lzbmetal.com\\\/#\\\/schema\\\/person\\\/03225aba1019488054ecea53728c5cf0\"},\"description\":\"The Luzhongbao 700\u00d7800\u00d7120 square outer frame with circular inner core manhole cover, equipped with an anti-falling net, is a heavy-duty protective facility specifically designed for modern urban areas with high safety standards. 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