A.雙面點(diǎn)焊和單面點(diǎn)焊 B.單點(diǎn)點(diǎn)焊和多點(diǎn)點(diǎn)焊 C.雙面多點(diǎn)點(diǎn)焊和單面多點(diǎn)點(diǎn)焊
A.2 B.1 C.5