Actuating process of the balancer is discussed and then a step drive voltage waveform is defined.

介绍了平衡头作动过程，基于此给出了阶跃型驱动电压波形。

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President Umaru Yar'Adua has come under pressure to step up his anti-graft drive in one of the world's most tainted countries since he came to power in 2007.

VOA: standard.2009.04.18

To step forward and drive my own negotiations, as an adult woman, was both a liberating and intimidating experience.

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Or perhaps take it a step further and drive the online service, a threat to the traditional cable business, right into the ground?

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Jack McKee, who is also a DUP councillor, found the device on the front step of his Shanlee Drive home in Larne on Saturday.

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