If this is excessive, the valve threads can be sealed and made leak-free.

如果这是过度，阀门线程可以加以密封，使无泄漏。

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If a fastener to start packing leak-free state, it will lead to leakage of filler burns.

如果一开始将盘根紧固至无泄漏状态，则会灼伤填料导致泄漏。

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The handle turning torque should become snug, but not excessive when the valve is properly adjusted for leak-free operation.

手柄的旋转扭矩应该变得舒适，而且当对阀门进行适当地调整使其实现无泄漏操作时感觉不会过紧。

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What is certain is that only a few Romney hands know the details of the vice presidential selection process, making this year's iteration of the "veepstakes" -- a quadrennial feeding-frenzy of gossip and often ill-informed speculation -- one of the most secretive and leak-free endeavors in recent memory.

CNN: Romney risks playing running mate hand too early