laser length measuring machine
激光测长机

• oblique incidence interferometer
• oblique meridional ray
• oblique percil
• oblique prism
• oblique ray
• oblique sketchmaste
• oblique spherical aberration
• oblique wide-angle multiplexprojector
• obliquity
• obliquity factor
• oblong exit slit
• obscuration
• obscuration ratio
• obscure camera
• obscure glass
• obscure grays
• obscurity
• observable
• observation
• observation error
• observation instrument
• observation mirror
• observation window
• observatory
• observeing scaffold