发布时间:2025-01-24 04:46:09
大部分生产厂家都是采用45号圆钢打孔加工,价格相对于用无缝钢管做低0.1-0.2元/个,缺点是产量低,如果销量大的话,可以采用45号精密无缝钢管加工,提高产量,可以获得和圆钢加工相等的利润!
书上说施工图预算是投标报价的主要依据,不是施工定额吗,怎么是施工图预算呢
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