Bharat tubes corporationbharattubes.com/ms1.pdfIndian Standard IS: 1239 For Uses in Water, Gas,...
1
Bharat tubes corporationbharattubes.com/ms1.pdfIndian Standard IS: 1239 For Uses in Water, Gas, Steam and Air Line conforming to IS: 1239 (Pt l) - 2004, Equivalent to BS - 1387 1985
