Timer control pump operation time, less expensive and easy to operate.

定时器控制泵的运转时间，较便宜且操作简单。

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Series Sand control Pump have been developed to meet the requirement to solve the above problems.

为解决这些问题，我公司研制开发了多种适用于含砂井的特种抽油泵。

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A flow control to install before back flow of the loop into the tank and to head the frequence control pump.

流速控制必须安装在循环系统中储罐的回水之前以控制变频泵。

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Despite angry Republican rhetoric, the president has little control over prices at the pump.

ECONOMIST: Petrol prices

The less we import, the more control we have over what happens at the pump.

WHITEHOUSE: Building a Clean Energy Economy

They contain a battery-powered pump and bladder, allowing the cylinder to control its buoyancy.

BBC: Cyber-sailors to survey oceans