refractive optics
(1)折射光学
(2)折射光元件

• diamond blade
• diamond-charged ring tool
• diamond-charged saw
• diamond cutter
• diamond dust
• diamond grit
• diamond-impregnated tool
• diamond lap
• diamond lattice
• diamond-mesh reflector
• diamond mill
• diamond paste
• diamond pellet
• diamond powder
• diamond prinding wheel
• diamond saw
• diamond stop
• diamond turning
• diamond whel
• diaphaneity
• diaphanous
• diaphragm
• diaphragm gauge
• diaphragm setting lever
• diaphragm-spot