F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F16
ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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F16D
COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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2500/00
External control of clutches by electric or electronic means
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