发布时间:2025-02-03 17:06:14
镀锌钢材的价格大概是6元/米,4mm厚的钢材理论重量为31.4kg/m2,40*4的扁钢是0.04m2/米,所以价格为0.04*31.4*6元/米,算出来是7.536元/米
zuoyou 左右家私 chr001 科技布北欧简约公主床儿童房家具的品质之选
2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14 2025-02-03 17:06:14安装工程定额中如何区分主材与辅材辅材与实际相差较大中否可以调整
2025-02-03 17:06:14 2025-02-03 17:06:14