光学刻度盘的英文

• optical disc

• 光学:    optics; photology; photics
• 刻度盘:    division circle; dial scale; ...
• 光学刻度经纬仪:    optical scale theodolite
• 光学刻尺:    optical length scale
• 刻度盘:    division circle; dial scale; graduated circle; graduated disk; index(ing) plate; circular division