335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclasses 6+ for electromagnetically actuated polyphase circuit breakers with a common control means.
(Electricity: Magnetically Operated Switches, Magnets, and Electromagnets; subclasses; 6+; for electromagnetically actuated polyphase circuit breakers with a common control means)
Electricity: Magnetically Operated Switches, Magnets, and Electromagnets
subclasses
6+ for electromagnetically actuated polyphase circuit breakers with a common control means