When the water tank after falling, floating ball valve to open, the control room pressure drops, the main valve to open again to water, keep the level set height.

当水池水面下降后，浮球阀重新开启，控制室水压下降，主阀再次开启继续供水，保持液面的设定高度。

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Unemployment in the U.S., which is running at 8.1%, means there are people available to work when jobs open up and the rate is at a level that there is no wage pressure.

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