When choose the style of bathroom ark, you should ensure the overhauling of water pipe and the opening of valve. Don't leave trouble for the maintenance and repair.

在挑选浴柜款式时，要保障进出水管的检修和阀门的开启，不要给以后的维护和检修留下麻烦。

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This paper focuses on effects of the valve characteristics and the transfer pipe delay on dynamic performance for boiler drum level, under varying valve opening of the feed water control valve.

本文着重探讨当给水调节伐门开度变化时，伐门特性以及管路传输迟延对锅炉汽包水位动态特性的影响。

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A water inlet pipe of the water discharge valve can be connected with a long plastic pipe and a water source for opening cavities and watering.

放水阀的进水管可接一根长塑料管，并与水源接通，可用来开穴与浇水。

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