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双U 形对接焊
met.
double-U butt welding
;
double-U groove welding
双 U 形对接焊
met.
double-U groove welding
双 V 形〔X形〕对接焊
industr.
double V butt weld
双U 形对接焊
:
14 phrases
in 4 subjects
Chemistry
1
Metallurgy
7
Plastics
5
Technology
1
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