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to phrases
钝化处理
dùnhuà chǔlǐ
auto.
immunization
el.mach.
passivation treatment
met.
passivating treatment
steel.
passivation
钝化处理
形成保护膜
dùnhuà chǔlǐ
shipb.
passivating
钝化处理
:
8 phrases
in 3 subjects
Metallurgy
4
Oil / petroleum
2
Technology
2
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