有些地方的冲水厕所的水箱,每隔一定时间就会自动放水冲洗。为什么每隔一定时间就会自动放出水来呢?这种水箱的构造是怎样的呢?下面让我们用一些纸水杯来仿造一个装置。不过,类似构造的制品在很早以前就有,那是一种陶制酒杯。如果喝酒的人太贪杯,在斟酒时老想倒得满满的,结果倒到超过酒杯的一定高度时,酒杯里的酒却不知不觉地变没了。 In some places, the water tanks in flush toilets will be automatically flushed at regular intervals. Why is the water automatically released at regular intervals? What is the structure of this tank? Let’s use a paper cup to simulate a device. However, similarly constructed products had existed long ago. It was an earthenware glass. If the drinker is too greedy for a cup, he always wants to be full when he is drunk. When the result falls to a certain height above the glass, the wine in the glass disappears unconsciously.