EN 1090-1:2009 Execution of steel structures and aluminum structures Part 1: Requirements for conformity assessment of structural components.
EN 1090-1:2009 钢结构及铝结构的施工,结构零件一致性评估的要求。
...
EN 1090-1:2009 Execution of steel structures and aluminum structures Part 1: Requirements for conformity assessment of structural components.
EN 1090-1:2009 钢结构及铝结构的施工,结构零件一致性评估的要求。
...