A.0.60% B.0.30% C.0.45% D.0.50%
A.2.5mm B.4.0mm C.2.0mm D.3.2mm
A.氣孔和夾渣 B.裂紋和未焊透 C.咬邊和焊瘤 D.未焊透和焊縫成形不良