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活性区 huóxìngqū
avia.	active area
el.mach.	active section
nucl.phys.	fissile core
oil	active region
space	active zone
反应堆活性区 huóxìngqū
gen.	core
活性区【核】 huóxìngqū
el.	fissile region; fissionable region
反应堆活性区 huóxìngqū
met.	fuel core
反应堆活性区核 huóxìngqū
el.	core
活性〔灵敏，现役〕区
el.	active area

活 性区 : 26 phrases in 11 subjects

Advertising	1
Agriculture	1
Chemistry	1
Electronics	5
General	1
Geophysics	1
Nautical	1
Nuclear physics	2
Oil / petroleum	1
Space	2
Technology	10