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洗砂
tech. cleaning of sand; grit washing; sand washing
洗 砂
: 87 phrases in 18 subjects
Architecture2
Automobiles1
Construction4
Desert science1
Drilling2
Ecology2
Electronics2
Engineering geology2
General3
Hydroelectric power stations1
Mechanic engineering1
Metallurgy1
Oil / petroleum1
Soil science1
Space1
Technology44
Textile industry17
Water resources1