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PCE
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CPC Subgroup
G04B 3/12

by mechanical means, e.g. pneumatic motor (winding up with electric or electromechanical means G04C )

Full Title

Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously > by mechanical means, e.g. pneumatic motor (winding up with electric or electromechanical means G04C )