MILL
发表于 2025-3-23 10:07:17
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Altitude
发表于 2025-3-23 15:39:13
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Mhc-Molecule
发表于 2025-3-23 19:55:34
Where does invention end, and design begin?e problem. In the example just mentioned the energy can be transferred by allowing the water either to rotate the shaft by means of suitably-shaped blading (the water-turbine) or to displace the piston of a reciprocating engine and produce the rotation by a crank mechanism.
hypnogram
发表于 2025-3-24 01:50:42
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钢笔记下惩罚
发表于 2025-3-24 02:39:00
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Liberate
发表于 2025-3-24 09:14:37
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挑剔小责
发表于 2025-3-24 10:56:02
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换话题
发表于 2025-3-24 18:00:45
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结束
发表于 2025-3-24 20:29:11
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不可思议
发表于 2025-3-25 00:17:24
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