open - outd
- open
- open access environment
- open antenna
- open arc
- open arc lamp
- open cell
- open channel
- open circuit
- open circuit admittance
- open circuit characteristic
- open circuit current
- open circuit impedance
- open circuit operation
- open circuit subtransient time constant
- open circuit test
- open circuit time constant
- open circuit voltage
- open coil armature
- open coil armature winding
- open conduit
- open core transformer
- open cycle gas turbine
- open delta connection
- open emitter
- open ended coil
- open feeder
- open flume water turbine
- open fuse
- open gap
- open loop
- open loop control
- open loop control system
- open loop gain
- open loop system
- open loop transfer function
- open looped pulse system
- open machine
- open magnetic circuit
- open phase
- open phase fault
