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孔径光阑
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光阑孔径
diaphragm opening
光阑孔径
iris aperture
光阑孔径
aperture of diaphragm
光阑孔径测量
diaphragm aperture measurement
可变光阑孔径
iris aperture
孔径与光阑
aperture and stops
孔径光阑
aperture stop
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