“Leonardo da Vinci friction experiments”的概念、定义、翻译、参考文献-科学参考

单词	Leonardo da Vinci friction experiments
释义	Leonardo da Vinci friction experiments Encyclopedia 工学摩擦释 Leonardo da Vinci friction experiments达·芬奇摩擦实验达·芬奇发明了几种不同装置，用来测试木材间的滑动摩擦和滚动摩擦特性，发现当木块M的重量加倍时用绳索拖动木块M向左滑动所需要的重物F的重量也加倍，重物F的重量是木块重量的四分之一，是一个常数，而且与木块横竖放置（即改变与台面的接触面积）无关的实验。
随便看	venous pressure venous pump/muscular pump venous rete venous return venous sinus venous thromboembolism venous valve venous valve transposition venous valvotransplantation vent Ven Te Chow vented fuel element ventilated thermocline ventilating pit ventilating tissue ventilating warehouse storage ventilation ventilation and air-conditioning design of protective engineering ventilation and air conditioning system for subway ventilation and cooling system for mining ventilation bridge ventilation capacity calculation ventilation control combustion ventilation control during mine fires ventilation door

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