thread micrometer
螺纹测微计，螺线千分尺

• frequency pulling effect
• frequency pushing and frequency pulling
• frequency response
• frequency shift
• frequency space
• frequency spectrograph
• frequency splitting
• frequency stabilization
• frequency stabilization of laser
• frequency stabilized carbon dioxide laser
• frequency stabilized He-Ne laser
• frequency stabilized laser
• frequency stabilized lasers
• frequency stabilizing system
• frequency stabliltiy
• frequency summing
• frequency-sweep generator
• frequency sweeping
• frequency transfer function
• frequency up-convrsion
• frequnecy spectrum
• frermi
• frescanar
• freshly-deposited aluminum
• fresnel