reticle
(1)调制盘
(2)分割板，标线片
(3)光栅

• tooth
• tooth clutch
• toothed gearing
• tooth profile
• tooth ripple
• tooth thickness
• top
• topaz
• top base
• topgraphic surveying
• top level
• toplimit
• Topogon lens
• topographics
• topography
• top view
• torch
• toric lens
• toric lenticular
• toric smoothing machine
• toric surface
• torid
• toroidal
• toroidal astigmatism
• toroidal cavity resonator