TANTATIVE SPECIFACATION FOR LOW ALLOY STEEL ARC WELDING ELECTRODES
AMERICAN WELDING SOCIETY
TANTATIVE SPECIFACATION FOR LOW ALLOY STEEL ARC WELDING ELECTRODES - AMERICAN WELDING SOCEITY 1948 - 18
TANTATIVE SPECIFACATION FOR LOW ALLOY STEEL ARC WELDING ELECTRODES - AMERICAN WELDING SOCEITY 1948 - 18