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锥形牙轮
 锥形牙轮
oil conical cutters
| 钻头
 钻头
gen. drill
bridg.constr. borer
hydroel.st. aiguille; drill bit; bore bit
met. drilling bit; straight bit

to phrases
锥形牙轮
oil conical cutters
tech. taper cutter; taper mill
锥形牙轮
: 4 phrases in 2 subjects
Oil / petroleum3
Technology1