IS:11931-1987. Indian standard specification for sewer deaning metal rods.
Bureau of Indian Standards[BIS]
IS:11931-1987. Indian standard specification for sewer deaning metal rods. - New Delhi Bureau of Indian Standards 1987 - 6p.
ENG
IS CODE / B.I.S
IS:11931-1987. Indian standard specification for sewer deaning metal rods. - New Delhi Bureau of Indian Standards 1987 - 6p.
ENG
IS CODE / B.I.S