inhibit 发表于 2025-3-30 12:01:25

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使纠缠 发表于 2025-3-30 15:16:27

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chlorosis 发表于 2025-3-30 17:18:58

J. S. Raoerves as a valuable companion to standard textbooks in speci.Atlas of Anatomic Pathology with Imaging - A Correlative Diagnostic Companion. is a valuable teaching tool for medical students and residents in several specialities such as pathology, radiology, internal medicine, surgery and neurologic s

PATRI 发表于 2025-3-31 00:23:15

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去才蔑视 发表于 2025-3-31 02:39:34

Science before the Medieval Period,eometry from Egypt was imported and Greeks began to develop it and arithmetic into separate branches of mathematical science. In the next several hundred years, Hippocrates (460-  BC), Aristotle (384–322 BC), Euclid (323–285 BC), and others systematized what was then known about geometry and arithme

Consensus 发表于 2025-3-31 05:26:46

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Prostaglandins 发表于 2025-3-31 12:35:06

Wind Mills,ills appeared to harness more inanimate energy by employing wind sails. The wind wheel of Heron of Alexandria marks one of the first known instances in history of wind powering a machine . The first practical windmills were the vertical axle windmills invented in eastern Persia, as recorded by th

诽谤 发表于 2025-3-31 17:06:59

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指数 发表于 2025-3-31 18:40:52

Renaissance Engineers, for making pressure exerted by the atmosphere entirely explicit belongs to Otto von Guericke (reprint 1963), who in 1672 published the famous book in which he described his air pump and the experiments that he made with it from the mid 1650s onwards. His famous demonstration is illustrated in Figur

使尴尬 发表于 2025-4-1 01:39:24

Industrial Revolution,y of mankind..Glasgow University had one of the Newcomen engines for its natural philosophy class. In 1763, one hundred years after the birth of Newcomen, this apparatus went out of order and Professor John Anderson gave JamesWatt (1736-1819) the opportunity to repair it. After the repair and while
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查看完整版本: Titlebook: History of Rotating Machinery Dynamics; J. S. Rao Book 2011 Springer Netherlands 2011 finite elements.history.machinery dynamics.rotor dyn