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孔阑
tech. aperture stop
therm.energ. aperture diaphragm
孔径光阑
chem. aperture stop
孔 阑
: 32 phrases in 13 subjects
Air defense2
Communications1
Construction2
Dermatology1
Earth sciences1
Electronics4
General1
Metallurgy2
Oil / petroleum1
Space3
Surgery1
Technology12
Video recording1

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