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to phrases
定期试验
busin.
cyclical test
hydroel.st.
periodic test
met.
routine test
nucl.pow.
periodic/regular test
tech.
periodical test
定 期 试验
:
14 phrases
in 8 subjects
Agriculture
1
Automobiles
1
Aviation
1
Ecology
2
Oil / petroleum
1
Plastics
1
Space
2
Technology
5
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