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ash coal
el. 高灰煤
met. 高灰分煤
shipb. 灰分煤
tech. 多灰分煤
ash coal
: 50 phrases in 9 subjects
Agriculture1
Architecture1
Chemistry1
Ecology1
Electronics5
Explosives and Explosive Ordnance Disposal1
Metallurgy8
Oil / petroleum2
Technology30