3米的两面墙之间如果用两根间距500mm的角钢做支架请问用什么号的角钢才能保证不弯
2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58浙江10安装定额中矩形风管保温的工程量怎么计算例如500400的矩形风管用橡塑板保温厚度为30mm
2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58 2025-02-02 03:20:58