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最适合泵送的混凝土坍落度是()。 A.20mmB.50mmC.80mmD.100mm
最适合泵送的混凝土坍落度是()。
A.20mm
B.50mm
C.80mm
D.100mm
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最适合泵送的混凝土坍落度是()。
A.20mm
B.50mm
C.80mm
D.100mm
以下坍落度数值中,适宜泵送混凝土的是()。
A.70mm
B.100mm
C.200mm
D.250mm
A.60mm
B.80mm
C.100mm
D.140mm
A.泵送混凝土设备有混凝土泵、输送管
B.混凝土泵按作用原理分为液压活塞式、挤压式和气压式三种
C.泵送混凝土的粗骨料宜优先选用碎石
D.泵送混凝土的坍落度宜为60~80mm
A.55mm,100~120mm
B.60mm,100~130mm
C.50mm,100~140mm
D.65mm,100~150mm
A.不同泵送高度
B.环境温度
C.运输方向
D.建筑物高度
A.50mm
B.30mm
C.100mm
D.150mm