男女羞羞视频在线观看,国产精品黄色免费,麻豆91在线视频,美女被羞羞免费软件下载,国产的一级片,亚洲熟色妇,天天操夜夜摸,一区二区三区在线电影

Outside In

Who invented reinforced concrete?


(China Daily)
Updated: 2009-11-20 13:42
Large Medium Small

A: Joseph Monier, a gardener from France patented the invention in 1867 and exhibited the product at the Paris Exhibition the same year.

The commercial gardener created the reinforced concrete through trial and error after being frustrated with all the low-grade pots he used, which would easily fall apart because they were made of mud and clay.

He conceived that adding cement would make the pots sturdier, and put his idea into reality by inserting iron mesh into the pots. After some improvements, the result led to reinforced concrete, which drew much attention from constructors. The product is a necessity for all modern construction projects.

 

Voice
 

Copyright 1995 - 2010 . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
主站蜘蛛池模板: 永清县| 南平市| 缙云县| 且末县| 新昌县| 浪卡子县| 汉中市| 广平县| 鹤庆县| 安国市| 双辽市| 大同市| 神木县| 清流县| 祥云县| 扎鲁特旗| 曲麻莱县| 依安县| 莱西市| 历史| 昌乐县| 柘城县| 鄢陵县| 栖霞市| 八宿县| 黎川县| 绥化市| 灵武市| 桐城市| 渝北区| 通州区| 大埔县| 洪雅县| 鹿邑县| 双辽市| 库伦旗| 马尔康县| 泽州县| 水富县| 濮阳县| 东乡| 海晏县| 祁门县| 酉阳| 怀柔区| 铜川市| 上思县| 涪陵区| 金山区| 安多县| 昌江| 芦溪县| 赞皇县| 浪卡子县| 望城县| 康马县| 凌源市| 济源市| 威远县| 太谷县| 山西省| 江达县| 九龙坡区| 屏东县| 松桃| 西林县| 岳阳县| 东乌珠穆沁旗| 平度市| 平舆县| 邮箱| 芦溪县| 石嘴山市| 玉溪市| 图木舒克市| 涡阳县| 武川县| 漠河县| 安仁县| 禄丰县| 普定县| 旌德县|