multi elliptical-cryindrical cavity
多椭圆筒共振器

• relay lenses
• relay objective
• relay system
• release
• release lever
• releasing device
• relevant dimmer state
• reliability
• relief
• relief developing machine
• relief image
• relief telescope
• relief television
• re-lighting
• relocation
• reluctance
• remagnifier
• remainder
• remanence
• remote
• remote control
• remote-control camera
• remote-control microscope
• remote heterodvne detection technique
• remote manipulation