finder aperture
(1)寻像器孔径
(2)瞄准器孔径

• nematic crystal
• nematic liquid crystal
• nematic phase
• nematogen
• neodymium
• neodymium-activaed
• neodymium aser-oscillator
• neodymium crystal laser
• neodymium-doped glass
• neodymium-doped laser glass
• neodymium fluoride
• neodymium glass
• neodymium glass laser
• neodymium laser radiation
• neodymium oxide
• neodymium pentaphosphate laser
• neodymium-phosphate glass oscillator
• neodymium ultraphosphate
• neomanoscope
• neon
• neon bulb
• neon-hydrogen bubble chamber
• neon lamp
• neon light
• neon-like ion