混凝土砌块|沙特标准|SASO-ASTM-C139
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混凝土砌块|沙特标准|SASO-ASTM-C139
SASO-ASTM-C139
Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes
集水池和检修孔施工用混凝土砌块的标准规范
SASO-ASTM-C139
Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes
集水池和检修孔施工用混凝土砌块的标准规范
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