掩护电弧熔接

[机] shielded-are welding

yǎn hù diàn hú róng jiē ㄧㄢˇ ㄏㄨˋ ㄉㄧㄢˋ ㄏㄨˊ ㄖㄨㄥˊ ㄐㄧㄝ