The paper analysis the causes of water seeping from suspended ceiling in fan - coil systems, and discusses how to prevent it when we design or install a system.

该文分析了风机盘管系统出现吊顶渗水问题的原因，讨论了为避免渗水在设计和安装上应注意的问题。

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The coil is suspended in an external magnetic field and the current running through it adjusted so that the attraction between the two magnets balances the gravitational force on the suspended mass.

ECONOMIST: Weighing a kilogram