Indian Standard Spcification for pipe threads for gas list tubes and screwed fit
Indian Standards Institution
Indian Standard Spcification for pipe threads for gas list tubes and screwed fit - New Delhi 1956 - 0.916666667 - IS-554; Indian Standards Inst .
Indian Standard Spcification for pipe threads for gas list tubes and screwed fit - New Delhi 1956 - 0.916666667 - IS-554; Indian Standards Inst .