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straight hole
dril. 直井
eng.geol. 垂直孔
golf. 直洞
oil 直井眼
tech. 直孔
textile 直纽孔; 直线纽孔
straight hole
: 17 phrases in 6 subjects
Drilling4
Explosives and Explosive Ordnance Disposal1
Mechanics3
Mining2
Oil / petroleum3
Technology4