论文部分内容阅读
有一个难问题,就会跟上一个奇办法。要想将大型石材劈成周正两块,古时候是很难的,用榔头、火药,硬对硬,石头宁碎也不会成方成圆。有人想法离奇,想到了木头,先在巨石上凿开一条缝,将木楔嵌入缝隙,滴水,木楔因潮湿而膨胀,石材顺了诱引方向裂开,木头劈开了石头!江苏溧水有条胭脂河,长10公里,贯通了石臼湖和秦淮河。朱元璋想定都南京时,西部安徽还受陈友谅干扰,长江水系保证不了南京城粮草的安全供给,想到了开凿这条河,让太湖流域
There is a difficult problem, it will keep up with a surprising way. If you want to split the large stones into two weeks, ancient times is very difficult, with a hammer, gunpowder, hard to hard, stone will not be broken into a round. Some people think of bizarre, think of the wood, first in the boulder cut a seam, the wedge embedded in the gap, drip, wedge expansion due to dampness, the stone along the direction of tearing open, split the stone wood! Jiangsu Lishui Rouge River, 10 km long, through the Shijiu Lake and the Qinhuai River. When Zhu Yuanzhang tried to capitalize on Nanjing, the western part of Anhui Province was still disturbed by Chen Youliang. The Yangtze River could not guarantee the safe supply of Nanjing City’s forage. He thought of digging the river and letting the Taihu Lake Basin