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上第三系 shàng dìsān xì
geol. Neogene
oil Neogene system
上第三系【地】 shàng dìsān xì
tech. Neozoic
上第三系岩石 shàng dìsān xì
geol. Upper Tertiary rocks
上第三系
: 1 phrase in 1 subject
Drilling1

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