The Q4000 will then have control over the valves that connect the choke and kill lines to the well proper.

那时Q 4000会控制连接阻塞管和压井管到油井的真空阀。

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Reduced Pressure Zone Assemblies must be inspected and tested periodically, in accordance with local codes, to ensure proper operation of check valves within the unit.

减压区总成必须按照当地有关规定定期检查和测试，以确保这种装置内的止回阀能够正常运行。

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The design principle of hydraulic balance in air conditioning water system was illustrated and several kinds of balancing valves and their proper application in the system have been introduced.

阐述空调水系统水力平衡的基本设计原则，介绍几种平衡阀的工作原理及其在系统中的合理应用。

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The DOT issued a proposed compliance order directing Exxon to conduct training for supervisors and pipeline control room workers, including on the proper operation of remote control valves.

NPR: APNewsBreak: $1.7M Penalty Proposed In Exxon Spill

The Q4000 will then have control over the valves that connect the choke and kill lines to the well proper.

ECONOMIST: The Gulf oil spill