It is indicated that the end valve-closure water hammer is the main problem which influencing the system safety.

对重力有压输水系统的水锤特点进行了分析，指出末端关阀水锤是影响系统安全运行的主要问题。

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For foot valve, replace inlet end connection with an F. V. screen housing assembly.

对于底阀，用一个F.V。滤网外壳组件更换进口连接管接头。

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KCB gear pump are mainly gear, shaft, pump body, valve, shaft end seal.

kcb齿轮泵主要有齿轮、轴、泵体、安全阀、轴端密封所组成。

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On a conference call, Arena Chief Executive Jack Lief said that there were heart valve problems seen in the trial, but that in the end he expects no difference between Arena's drug and placebo when it comes to this side effect.

FORBES: Magazine Article

At the end of the 20-minute exam, Gandy informed her that she had a leaky heart valve and would need to be checked annually.

CNN: More patients tackling heart issues earlier