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PCE
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CPC Subgroup
G02B 23/24

Instruments for viewing the inside of hollow bodies, e.g. fibrescopes

Full Title

Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices > Instruments for viewing the inside of hollow bodies, e.g. fibrescopes

3 direct subcodes

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