链式水车    

       原理：链传动是应用较广的一种机械传动，由链条和主、从动链轮组成，链轮上有特殊齿形的齿，依靠轮齿和链节的啮合来传递运动和动力。此装置是将一些水杯固定在链条上，随着链子转动，下方的水杯深入水池后，便可装入水，并携装入的水上升至顶端，再倒入大水槽。这样，也就实现了机械能向势能的转化，让观众体会一种能量的转化方式。    

       操作：观众转动链式水车的手轮，将水槽内低水位的水，通过链子水车上安装的水桶，将水提升到水车顶部的水槽里。

Chain waterwheel    

        Principle: chain drive is commonly applied, which consists of chain strip、primary and subordinate chain wheel. With special shaped teeth, it transfers move and power depending on the joggle of wheel teeth and chain node. This equipment fixes the water cups on the chain, along with the rotation of the chain, the cups below dip into the water and is filled, when the cups reach the top, the water is poured into the groove. So, in this way, it realizes the transformation from machinery energy to potential energy. And also, the visitors experience a way of energy transformation.     Operation: rotating the handwheel, the visitors can bring water from the lower place up to the higher place in the groove through the barrels fixed in the chain waterwheel.