Such as steel, cement, coarse aggregate, fine aggregate, anchor. The The Is it a concrete definition?
Engineering need to do the re-test of raw materials: steel, brick, cement, sand, stone (if it is not a commodity concrete) waterproof coating, waterproof membrane
Electric tube class, wire type, switch socket type, lamps and so on Plumbing tube type tube type tube type radiator type valve class
There are three large series of buildings, civil, electrical, plumbing, civil steel reinforced concrete, is called 3 large, masonry, commodity concrete, turnover, waterproof, paint, flooring, small materials
