New technology manhole cover makes Jiqiao sigh in amazement

In Japan, there is a manhole cover that uses rainwater as kinetic energy. People stand near this manhole cover and point out the direction of the subway and the bus stop. This is not a joke, but a living fact. The manhole cover uses the rainwater to rotate the fan inside to obtain kinetic energy. When the user stands on it, the display is activated. Stand on the right to display the direction of the subway, and stand on the left to display the direction of the bus stop.

There are also primary school students in China who have invented a new type of anti-theft indicator manhole cover., "New type of manhole cover" is equipped with two warning signs with springs on the inner side of the manhole cover, and a highly reflective reflective sticker is pasted on the inner side of the manhole cover. This "new type of manhole cover" is simple in appearance, but it can solve the traffic accidents caused by the theft of manhole covers. When the manhole cover is intact, it is no different from the normal situation; when the manhole cover is stolen, the warning sign immediately bounces up, and the reflective sticker is clearly visible, which can automatically and timely remind pedestrians of the safety of driving, and effectively avoid the occurrence of traffic accidents.

Domestic production of manhole covers has now far reached this level of technology. As a manufacturer, there may not be too much time and energy to consider this issue, but the first time I saw this report, Ji Qiao was still amazed!