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Ducts shall be checked for water tightness before concreting .

混凝土浇筑之前应对管道进行水密检查。

The act or process of concreting into a mass ; coalescence .

凝结使凝成一团的过程或动作；凝结。

Manpower of concreting : five people per pump truck , total 20 persons .

浇筑人员：每台泵车一组5人，共20人。

The workman is still busy concreting the road .

工人还在忙着用混凝土铺路。

The workmen are concreting the road .

这些房屋是用钢和混凝土建成的。