| Commercial quality carbon steel. Grades
Сталь углеродистая обыкновенного качества. Марки. |
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GOST 17.1.3.07-82Environmental protection. Water. Rules for … |
GOST 12820-80Flat steel welded flanges for PN from 0.1 to … |
GOST 21.101-97Construction Design and Estimate Documentation. … |