The second step is to select the closure may be required to meet the speed of the check valve type.

第二步是选择可能满足所需要的关闭速度的止回阀类型。

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Step on flush water valve and pump at least 15 strokes with pump handle.

脚踩在进水阀门踏板上，同时将手摇泵摇压最少15下。

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The thesis studies mainly the drive and control technique of aeronautic linear DC step motor(LDCSM) used in emergency discharging oil valve on airplane.

本文针对“十五”航空基金项目—新型航空用直线直流电动机驱动控制系统，研究了飞机应急放油阀用航空直线步进电动机的驱动控制技术。

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Becoming vulnerable, and understanding that we need to talk about what happened, is the first step in opening the emotional pressure valve that is inside all of us.

CNN: There is no shame in not being Superman

First of all, the relief valve is the final and most assured final step -- that would be to essentially drill down the 19, 000 feet to where the formation is and to block off the well that is now open.

WHITEHOUSE: Press Briefing on Oil Spill in Gulf of Mexico

The next step is getting prototypes into gamers hands -- she says Valve already has a production line for short runs, making a beta possible -- and iterating on design before launch.

ENGADGET: Valve's first hardware beta starting by next year, wearable computing still far off