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What is mechanical engineering in ancient China?
簡單機械是一切複雜而重大機械的基本要素。任何複雜的機械都是由幾種簡單機械組成。從力學意義上說,簡單機械有四種:槓桿、滑輪、斜面與螺旋。
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The Compass and Ancient Sailing
The “south-pointing needle” is a magnetic pointing device. When combined with directional markings, it forms a compass. The invention of the compass had a decisive effect on the development of human civilization.
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Mechanical Engineering in Ancient China
Machines in ancient China included the following eight categories: simple, vehicle and animal-drawn, hydraulic, wind-powered, weaponry and thermal, time keeping, earthquake detection and automated, and flying machines.
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哪些機械離不開水?
水力機械大致有三種含義:一、將水位升高的機械,如農田中常見的刮車、筒車、龍骨水車等;二、利用水流能量來作功的機械,如水磨、水碓、水排等;三、利用水的浮力或壓差以達到某種功用的機械。
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