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劳动最光荣：快来看几种传统农具的力学原理
source link: https://tech.sina.com.cn/d/v/2019-05-01/doc-ihvhiewr9294628.shtml
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文章来源：中科院物理所1。引言清明假期回了趟老家，在家里一间仓库里，忽然发现了几件农具，堆在角落里，落了厚厚的一层灰——回想起来，我已经十一年没有用过它们了。我的中考和高考都正赶上麦收时节，中考是在镇上，离家五公里，下了考场，骑自行车回家，
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