亚洲国产综合图片_高清自拍三级国产_免费午夜无码片在线观看_中国成人精品二区_2019中文文字在线高清视频MV_黄色三级电影在线观看_草莓视频未满十八勿网站_欧美日本亚洲精品_老外也不敢一个人玩MC_992tv成人免费视频

With a stick, overcoming resistance can push an object. The speed at which an object moves depends on the speed at which the stick moves, because the stick is solid.

If a stream of water hits an object, it may also push an object. The larger the water volume and the higher the water flow velocity, the greater the driving force. The speed at which an object moves is different from the speed of water flow because water is a liquid and has no fixed shape.

If the water flow is open, there will be a great loss. If the water flow is collected in a container, the water will not be lost and the energy efficiency will be higher.
Because this technology mainly depends on the speed and quality of the liquid, that is, kinetic energy, it is called dynamic pressure transmission, or hydraulic transmission. Due to its flexibility, it also has certain applications, such as fluid couplings, torque converters, etc., but there are fewer product types and are not the subject of this book.
If you close the water and squeeze the stick, you can also push the object.