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
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
15271807183 |
在线认证咨询 |