photoacoustic determination
光声测定

• light overtone
• light pattern
• light pen
• light pencil
• light pen detect
• light pen light pencil
• light phase modulation
• light photon
• light pipe
• lightpipe potics
• Light-powered telephone
• light press fit
• light pressure
• light prolarization modulator
• light-proof
• light pulse
• light pulse modulation
• light pulse repetition rate
• light pump
• light pumped laser
• light-pumped solid state laser
• Light quantity
• Light quantum
• light quantum maser
• light quatntum