Optometrist 发表于 2025-3-26 22:30:46
Book 20091st editionrs and craftsmen who existed centuries and millenniums before us; who solved problems using the devices of their era, making machinery and equipment whose concept is of such a surprising modernity that we must rethink our image of the past.Bumble 发表于 2025-3-27 04:28:41
http://reply.papertrans.cn/16/1570/156982/156982_32.pngantedate 发表于 2025-3-27 07:12:37
http://reply.papertrans.cn/16/1570/156982/156982_33.pngArresting 发表于 2025-3-27 12:27:35
http://reply.papertrans.cn/16/1570/156982/156982_34.png检查 发表于 2025-3-27 14:29:00
Dresdens Glanz, Stolz der Dresdnerces are available. For this reason in the present chapter we will look at those that were available in ancient times..What we call today “computing machines” were invented and developed after the 16th century but, as will become clear in the following sections, older devices are, without any doubt,眨眼 发表于 2025-3-27 18:25:57
https://doi.org/10.1057/9780230372757vices that create energy by using the kinetic energy released by the movement of an aeriform mass..Since it does not have a specific volume or a precise mass, air occupies all available space, varying its intensity in accordance with the space in which it exists. Considering that warm air is lighterRegurgitation 发表于 2025-3-27 22:27:37
https://doi.org/10.1057/9780230372757vers or the tides of the sea. These spontaneous machines were later copied, transforming them into blades and turbines. It soon became clear that the latter two were also reversible, that is, capable of rotating when immersed in moving water and movable when rotated in still waters. The first wheele搜集 发表于 2025-3-28 05:31:33
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,Seeing through Pamela’s Clothes,d illustrated the close relation between inclination, current and movement of the water. It was by following these examples that ancient civilizations were able to build aqueducts, which were no more than canals with potable water. As for the very ancient cisterns, these became the complement of thepropose 发表于 2025-3-28 13:33:56
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