Concrete pipes and ancillary concrete products, Specification for unreinforced and reinforced concrete pipes (including jacking pipes) and fittings with flexible joints (complementary to BS EN 1916:2002)— 26 стр.
Concrete pipes and ancillary concrete products, Specification for unreinforced and reinforced concrete pipes (including jacking pipes) and fittings with flexible joints (complementary to BS EN 1916:2002)— 26 стр.