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oxygen-free flux
met. 无氧熔剂
tech. 无氧焊剂
oxygen-free: 42 phrases in 16 subjects
Agriculture1
Chemistry1
Earth sciences2
Ecology1
Electric machinery1
Electronics3
General2
Geophysics1
Life sciences2
Metallurgy11
Nuclear and fusion power1
Oil / petroleum5
Oil processing plants2
Space2
Surgery1
Technology6

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