Kirchhoff formulation
基尔霍夫衍射理论

• reversible process
• reversible recording
• reversible spirit level
• reversible telescope
• reversible transformation
• reversible transit circle
• reversing clutch
• reversing dog
• reversing mechanism
• reversing prism
• reversing switch
• reversion
• revolution
• revolutionary
• revolution counter
• revolution meter
• revolver
• revolving axle
• revolving beam
• revolving center
• revolving nosepiece
• revolving stage
• revolving table
• RF cleaning-ring laser gyro
• RFI-immune