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to phrases
primary combustion
avia.
初次燃烧
;
预燃
;
初步燃烧
oil
一次燃烧
railw.
_次燃烧
space
主燃烧区燃烧
(燃烧室的)
primary combustion
:
5 phrases
in 2 subjects
Metallurgy
2
Technology
3
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