In Electric actuators, the primary limit switches are used to control the open and closed position of the valve.

在电动执行器里，主要限位开关用来控制阀门的开启和关闭位置。

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The controller is adapted to selectively control the operation of generating the position notification signals based on whether the driver is the primary driver or the secondary driver.

以及基于所述车辆驾驶员是否是所述主驾驶员和所述副驾驶员中的至少一个来选择性地控制所述生成位置通知信号的运转。

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Halvorson, who lost a primary challenge to Jackson last year, has been targeted by opponents for her position on gun control, which became a key issue in the district, parts of which have been deeply affected by Chicago's gun violence.

NPR: Voters Head To Polls In Ex-Rep. Jackson's District