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to phrases
secondary ion
el.
次级离子
;
二次
发射
离子
tech.
二次离子
secondary ion
:
44 phrases
in 10 subjects
Aviation
1
Earth sciences
4
Electronics
20
Geology
3
Oil processing plants
1
Plastics
1
Polymers
4
Space
1
Technology
8
Water resources
1
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