optical lock-on
(1)光学跟
(2)光学锁定

• tomosynthesis
• tonality
• tonal value
• tonal wedge
• tone
• tone control
• tone reproduction
• tongs
• tongue
• Tonometer and accessories
• Tonometer sterilizer
• tonotron
• tool
• tool box
• toolmaker
• toolmaker measuring microscope
• tool[room] microscope
• tool steel
• tooth
• tooth clutch
• toothed gearing
• tooth profile
• tooth ripple
• tooth thickness
• top