AWS B2.1-1-021:1994(R2005)
Заменен
STANDARD WELDING PROCEDURE SPECIFICATION (SWPS) FOR GAS TUNGSTEN ARC WELDING FOLLOWED BY SHIELDED METAL ARC WELDING OF CARBON STEEL, (M-1/P-1/S-1, GROUP 1 OR 2), 1/8 THROUGH 1-1/2 INCH THICK, ER70S2 AND E7018, AS-WELDED OR PWHT CONDITION
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