The intermittent control of wipers is related to the control switch, control relay and its control mode of the wipers operating circuit.

刮水器间歇控制与刮水器控制开关、刮水间歇控制继电器及其在刮水器工作电路中的控制方式有关。

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This includes manning X-ray machines, searching people, searching vehicles and operating closed-circuit television systems, he said.

CNN: UK faces security questions ahead of London Olympics

The staff were supposed to be doing tasks including venue perimeter security such as manning X-ray machines, searching people, searching vehicles, and operating closed-circuit television systems, G4S told CNN on Sunday.

CNN: Athletes fret on lost bus as wave of Olympic arrivals begins