A.3mm B.5mm C.8mm D.9mm
A.焊縫變寬、熔深加大 B.焊縫變寬、熔深減小 C.焊縫變窄、熔深加大 D.焊縫變窄、熔深加小
A.2%~3% B.4%~5% C.3%~4% D.5%~6%