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化学标准
met.
chemical standard
化学标准:
40 phrases
in 17 subjects
Agriculture
1
Animal husbandry
2
Aviation
2
Desert science
1
Earth sciences
7
Ecology
1
General
3
Geology
1
Hydroelectric power stations
1
Mathematics
2
Metallurgy
2
Name of organization
1
Oil / petroleum
3
Oil processing plants
1
Rail transport
1
Statistics
1
Technology
10
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