你可能感兴趣的试题
generate its own electrical power transform electrical energy into mechanical energy increase or decrease circuit voltage as required convert AC current to DC current
however whenever wherever whichever
confirmed thatREPEA TERpower supply indicating lamp of the master compass is lit turn on Power Supply Switchof the power supply unit turn on Power Supply Switchof master compass set Latitude Correction Knob"
avoid false alarms as a result of condensing water vapor avoid danger of frost under very cold weather reduce the viscosity of the crankcase atmosphere in order to improve the fluidity keep the temperature of the oil mist detectors in an appropriate range
It makes up five per cent of all electricity consumption in the United States. Electrical devices that have internal or external clocks consume standby power. Standby power is not of significance compared to the whole consumption of electricity. Standby power is important to maintain the normal functions of electrical devices.
STARTindication lamp of the master compass operating panel REPEATERpower supply indicating lamp of the master compass Power Supply Indicatorof the power supply unit RUNNINGlamp of the master compass operating panel"
secure and tag the electrical circuit place a crow bar in the flywheel of the unit inform all persons in the area not to start the unit make a log book entry
light power electricity energy
there might be an invisible injury deeper inside the body. many Americans die each year from electrical burns. lightning is too much for a person to endure. electrical bums will always lead to serious injury inside the body.
The control equipment The power unit The transmission system The follow-up mechanism
To warn the reader to stay away from them. To compare their voltage to that used in houses. To give an example of a living electrical generator. To describe a new source of electrical power.
Power Supply Indicator of the power supply unit STARTindication lamp of the master compass operating panel REPEATERpower supply indicating lamp RUNNINGlamp of the master compass operating panel"
vibration watertight integrity speed droop reactive power
turn off power first turn on power first with a test pen in hand tell C/E
the electricity thief who steals electricity at one’s home. electricity to power electrical appliances even when they are turned off. electricity to power electrical appliances when they are turned on. electricity waiting to be used when electrical appliances are turned of
control equipment power unit transmission mechanisms fittings and pipeline
Water energy Electrical energy Chemical energy Heat energy
dams reservoirs factories generators