A.3mm B.5mm C.8mm D.9mm
A.焊缝变宽、熔深加大 B.焊缝变宽、熔深减小 C.焊缝变窄、熔深加大 D.焊缝变窄、熔深加小
A.2%~3% B.4%~5% C.3%~4% D.5%~6%