标准号:NFA85-021-1982
英文标准名称:Arcweldingequipment.Powersources.Checksandtests.Heatingtest.Commutation.Typetests.
部分代替标准:NFA85-021-1974(A85-021);
NFA85-024-1974(A85-024);
NFA85-031-1976(A85-031);
NFA85-034-1976(A85-034)