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Concreting of reinforced concrete slab. Worker concretes foundation rebar pour cement mortar on reinforcing mesh or cage from pump concrete mixer. Builders are building a factory hangar house

视  频 ID:  1067765384
版      权:  Hleb Hladkouski
视频长度:  0:10
横纵比率:  16:9
所属分类:  建筑 工业 
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