Have a variety of ancient water on the apparatus, such as Egypt's chain pump (17th century BC), Chinese桔槔(17th century BC), windlass (11th century BC) and water (1 century AD).

古代就已有各種提水器具欧美男女a视频，例如埃及的鏈泵(公元前17世紀(jì))538精品视品一二区，中國的桔槔(公元前17世紀(jì))亚洲a毛网站、轆轤(公元前11世紀(jì))和水車(公元1世紀(jì))Av性爱网站有哪些。

The Chuang Tzu 》 recorded the way to take water from shaduf; Digging well for irrigation in Han Dynasty period; fixing the pond and building the aqueduct in Tang and Song dynasty , and the usage of dragon bone car, hurdy-gurdy, all recorded in history books, also recorded in 《 The Chinese agriculture history draft 》.

莊子》記載的桔槔取水激情一级a片在线播放；兩漢時的鑿井灌田黄色视频在线观看品；唐宋時修塘筑渠，以及龍骨車被强制伦A片在线观看、筒車的運(yùn)用精品无码一级毛片，史不乏書，并載入《中國農(nóng)業(yè)史稿》激情性爱在线观看。

It absorbed the merits of different mechanical structures, applied the mechanic principles of folk waterwheel, barrel car, as well as shaduf, cam, and balance weigh beam, and thus was an automatic observatory, which had the multi function of observation, demonstration and time giving, and it gained or lost no more than one second per day. It was the ancestor of the mechanical clocks, since

它吸取各家機(jī)械結(jié)構(gòu)之長亚洲是图宗合网，采用民間水車、筒車国产精品不卡无毒在线观看，以及桔槔免费视频XNXXCOM、凸輪、天平秤桿等機(jī)械原理精品国偷自产在线视频500，是集觀測欧美淫乱a片、演示和報時為一體的自動化天文臺a级黄色一区二区三区免费，精確度已達(dá)到誤差每日一秒，更因?yàn)椴捎昧嗽缙诘那芸v機(jī)構(gòu)国产午夜久久AV，成為機(jī)械鐘的祖先国产综合无码在线。