TREA

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Industry

  • CPC
  • G03B7/06
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Parent Industries

GPHYSICS G03Photography G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR G03B7/00Control of exposure by setting shutters, diaphragms or filters, separately or conjointly

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G03B7/06by a follow-up movement of an associated reference mark to the pointer
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