发布时间:2025-01-30 05:32:35
现浇:就是在工地现场浇筑。有些大梁、立柱不允许在现场浇,是因为现场没有实验器具或仪器,如果没有通过压力试验和成分检定,对建筑物的安全会有影响。
飞利浦剃须刀正常充电时间多久 飞利浦电动剃须刀充电需要几个小时
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