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penetration ratio
earth.sc. 渗透系数
expl. 穿孔率有效穿孔弹数占装弹总数的百分率
oil 针入度比
tech. 熔合比
penetration ratio
: 11 phrases in 8 subjects
Automobiles1
Commerce1
Consulting1
Economy3
International Monetary Fund1
Oil / petroleum2
Space1
Technology1