A.±20mm B.±15mm C.15mm
A.遠(yuǎn)期 B.近期 C.近遠(yuǎn)期 D.中遠(yuǎn)期
A.閃光對(duì)焊 B.埋弧壓力焊或電弧焊 C.閃光對(duì)焊或電阻點(diǎn)焊 D.電阻點(diǎn)焊