pump brake

Comparing with Liantong, Windlass and Jitong bamboo to squirt, Kewu in the shape of a bending pipe just was one implement which one word could have many means in the Agriculture Age.

从《后汉书》有关渴乌的史料入手,对渴乌是虹吸管的表述提出修正,对连筒是筒车的说法提出质疑,将渴乌与连筒、唧筒、辘轳等进行了比较,最后得出渴乌为农业时代一词多义的管状导水器具,它在古代生产、生活、军事、消防和科学实验上起到了一定的历史作用。