Threaded steel flanges for Pn 20-100 MPa (200-1000 kgf/cm2). Specifications.
Фланцы стальные резьбовые на Ру 20-100 МПа (200-1000 кгс/см2). Технические условия. |
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GOST 12.1.009-76SSBT. Occupational Safety Standards System. … |
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MinNR 788On approval of the procedure for issuing and … |