Control supply line water pressure. install a soft seated spring loaded check valve upstream of the assembly.

控制供应管道的水压。在总成的上游安装一个软阀座，弹簧负载止回阀。

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Based on solenoid valve design theory, by estimating the maximum air pressure and spring force, a direct operated solenoid valve is designed to control the open and close of the air chamber.

通过估算空气腔中的最大气体压力和回位弹簧的拉力，基于电磁阀设计基本原理，设计开发了一直动式电磁阀用于控制空气腔的开闭；

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Pressure spring machine is composed of main machine, control system, motor power unit, auxiliary device and auxiliary equipment.

压簧机械由主机，控制系统，电机动力单元，辅助装置，附属设备组成。

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Purcell pushed Mack out in 2001 and retained control of the firm until the spring, when he faced unrelenting pressure from shareholders to divest the firm of the underperforming brokerage business and the credit-card unit and focus the firm back on its core strength: institutional securities.

FORBES: Mack Refuses To Attack