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gravity drainage
eng.geol. 重力流泄; 重力疏干
hydroel.st. 重力排水
mining. 重力驱油
oil 重力泄油
surg. 重力引流
tech. 自流排水; 自然排水
gravity drainage
: 23 phrases in 6 subjects
Engineering geology1
Hydroelectric power stations2
Mining8
Oil / petroleum3
Oil processing plants1
Technology8