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horizontal hole
el. 水平孔道
expl. 水平炮孔
oil 水平井; 水平井眼; 水平炮眼
tech. 平孔; 水平孔
horizontal drill hole
tech. 水平钻孔
horizontal hole
: 13 phrases in 6 subjects
Aviation1
Drilling2
Explosives and Explosive Ordnance Disposal3
General1
Rail transport1
Technology5

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