Concrete pipes and ancillary concrete products-Specification for unreinforced and reinforced concrete manholes and soakaways (complementary to BS EN 1917:2002)
Concrete pipes and ancillary concrete products. Specification for unreinforced and reinforced concrete manholes and soakaways (complementary to BS EN 1917:2002)
Concrete pipes and ancillary concrete products-Specification for unreinforced and reinforced concrete manholes and soakaways (complementary to BS EN 1917:2002)