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唇面排水
 唇面排水
tech. face ejection
| 钻头
 钻头
gen. drill
bridg.constr. borer; boring bit; boring head
hydroel.st. aiguille; drill bit; bore bit
met. drilling bit; straight bit

to phrases
唇面排水
tech. face ejection
唇面排水
: 10 phrases in 2 subjects
Oil / petroleum2
Technology8