发布时间:2025-01-31 04:34:04
立:构造柱 尺寸 240*240 高3m。
工程量:240*240*3+0.03*3*2(两边马牙槎乘2,三边乘3)你自己在纸上画一下马牙槎宽60mm按30mm算是因为马牙槎是一进一出。
jbl tunerfm 便携蓝牙音箱收音机二合一购买最佳价格
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