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After the leak detection valve and the chamber evacuation valve are closed we vent the chamber and we draw off the helium.

在泄漏检测阀门和气室抽真空阀门关闭后，我们给气室放气并排除氦气。

Tidal currents in Long Island Sound do not exhibit the features of a progressive wave as in Chesapeake Bay.

长岛湾的潮流不象Chesapeake湾的潮流那样显示出前进波的特征。