bypass automatic shutoff circuit
bypass breaker replace circuit breaker
hydraulic bypass circuit
oil filter bypass switch circuit
100 % high pressure bypass
off-the-shelf integrated circuit
off-state of wire in secondary circuit
office enclosed circuit TV
off the shelf integrated circuit
off state of wire in secondary circuit
OEIC OptoElectronic Integrated Circuit
OECDoptoelectronic integrated circuit
OCTV Open – Circuit TeleVision