sum frequency generation
和频振荡

• oscillating point
• oscillation
• oscillation frequency
• oscillationg-crystal roentgenogam
• oscillation photograph
• oscillator
• oscillator continuum
• oscillator field
• oscillatory laser output
• oscillatory mode
• oscillatory phtoconductivity
• oscillgraph
• oscillion
• oscillistor
• oscillocsope-detector
• oscillogram
• oscillogreg
• oscilloprobe
• oscilloscope
• oscilloscope camera
• oscilloscope trance
• oscilloscope tube
• oscillosynchroscope
• oscitron
• osjcillating ode