step-by-step variable gear
多级变速齿轮

• linear prismatic grating
• linear programming
• linear pumping tube
• linear radiator
• linear range
• linear ratio
• linear relationship
• linear response
• linear scanning
• linear space-invariatn optical system
• linear spatially invariant system
• spectrometry
• spectromicroscope
• spectromodulator
• spectrophone
• spectrophotometer
• spectrophotometric trichromatic colorimeter
• spectrophotometry
• spectro-polarimeter
• spectroradiometer
• spectroradiometric quantity
• spectroradiometry
• spectroscopes, interference spectroscopes,spectrographs
• spectroscopically pure
• spectroscopic analysis