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硬砂岩 yìngshāyán
geol. hard sand
met. greywacke
oil graywacke
tech. blaize; hard sandstone; whine-rock
硬〔杂〕砂岩
gen. greywacke
硬【杂】砂岩
geol. graywacke
硬砂岩: 15 phrases in 6 subjects
Architecture1
Earth sciences1
General1
Hydroelectric power stations1
Oil / petroleum2
Technology9