发布时间:2025-01-31 22:57:46
盖房子现在一般砌基础用毛石,甲级毛石比较好。打混凝土用的10-30mm粒径的碎石,砌窗台以下部分用的块石,规格300*300*150mm。
现在都是找人用车去石场拉货,石场一般不给送货。你可以去集市去找专门拉石材的车辆去买。
减压阀中水电站减压阀与普通减压阀有何区别在水电站技术供水系统中是否可以用一般减压阀
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