[机] submerged-arc welding, submerged-melt welding
yǎn bì diàn hú róng jiē fǎ ㄧㄢˇ ㄅㄧˋ ㄉㄧㄢˋ ㄏㄨˊ ㄖㄨㄥˊ ㄐㄧㄝ ㄈㄚˇ