Mfr power equipment, transistors, capacitors, etc. Rectifiers, Inductors, Static converters, Inverters, Resistor or capacitor R/C networks, Ferrites, Adjustable pre set capacitors, Capacitor networks, Fixed capacitors, Variable capacitors or varactors, Uninterruptible power supplies, Chokes, Electric rotary converters, Capacitor banks, Reactors, Slip rings, Power distribution units PDUs