allochromatic crystal
(1)义质光导性晶体
(2)义质色晶体

• fixed slit
• fixed view shifter projector
• fixer
• fix-focus lens
• fixing bath
• fixing salt
• fixing solution
• fixning
• fix stopper
• fixture
• Fizeau fringe
• fizeau fringes
• Fizeau interferomenter
• fizeau interferometer
• fizeau interferometersFizeau
• fizeau toothed whool
• flag
• flake
• flame
• flame acrc lamp
• flame arc
• flame deflector
• flame emission deterctor
• flame emission spectroscopy
• flame excitation