telecentric system
(1)焦阑系统，远心系统

• survey
• surveying
• surveying camera
• surveying compass
• surveying instrument
• surveying system
• surveyor's level
• surveyor's transit
• survival
• susceptance
• susceptibility
• susceptor
• suspended particle
• suspender
• suspension
• suspension system
• sustained wave
• sustatiner-pumped laser
• S wave
• sweep
• sweep-initiating pulse
• sweep optical square
• sweep-out effect
• swelling effect
• swept-focus