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化学标准
met. chemical standard
化学 标 准
: 44 phrases in 18 subjects
Agriculture1
Animal husbandry2
Aviation2
Chemistry2
Desert science1
Earth sciences7
Ecology1
General3
Geology1
Hydroelectric power stations1
Mathematics2
Metallurgy2
Name of organization1
Oil / petroleum3
Oil processing plants1
Rail transport1
Statistics1
Technology12

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