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锥形钻头
gen. cone bit
eng.geol. point bit; taper bit
tech. corncob bit (换径用); splayed boring tool; tapered bit
锥形不取芯钻头
tech. taper bit
锥形无岩芯钻头
tech. cone bit
锥形钻头
: 22 phrases in 5 subjects
Drilling1
Earth sciences1
Engineering geology4
Oil / petroleum5
Technology11