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火山凝灰岩 huǒshānnínghuīyán
desert. cinerite
dril. tuff
hydroel.st. volcanite tuff
oil ash-tuff; volcanic tuff
tech. volcanic fragment; trass
火山凝 灰 岩: 17 phrases in 6 subjects
Desert science1
Engineering geology2
General1
Hydroelectric power stations2
Oil / petroleum3
Technology8