Electric Switchgear-Namely, Lever-Operated Switches; Pedal-Operated Switches; Rotary Switches; Cam-Operated Switches; Step-By-Step Servo Switches; Programmed Rotary Switches; Programmed Rotary Copy Switches; Sea Water-Proof Switches; Metal Housings for Switches; Lever-Operated Potentiometers; Pedal-Operated Potentiometers; Joy Stick Switches; and Switches, Switching Control Panels, Switching Control Units, and Switching Control Desks for Hoisting Appliances