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单面点焊 dānmiàn diǎnhàn
met. indirect welding
steel. indirect spot welding
tech. in direct spot welding; one-sided spot welding
单面多极点焊
met. series spot welding
单面多点点焊
tech. series spot welding
单面点焊: 5 phrases in 2 subjects
Metallurgy2
Technology3