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optics
Optical instruments and lenses
Binoculars
Boroscopes
Cinetheodolites
Coddington magnifying instruments
Glasses, field or opera
Lenses, optical: all types except ophthalmic
Lupes magnifying instruments, optical
Magnifying instruments, optical
Metallographs
Microprojectors
Microscopes, except electron, proton, and corneal
Periscopes
Phototheodolites
Spyglasses
Telescopes: elbow, panoramic, sighting, fire control, etc.
Telescopic sights
Triplet magnifying instruments, optical
Lens coating and grinding equipment
Lens coating equipment