永久免费观看的毛片视频下载

      <dd id="4v7md"><pre id="4v7md"></pre></dd>

        1. <button id="4v7md"></button>

          1. Sign in | Join Now | Sitemap Inquiry Basket(0)
            logo
            Home > News

            The High Speed Automatic Brick Making Machine [2011-04-11]

            In the modern society, we can hardly imagine a world, or even a city without brikcks. Without bricks, no modern construction is possible, including long bridges above the rivers and skyscrapers high in the air. Human beings have used bricks for a long time. As I have mentioned in my previous posts, Chinese people used bricks to build the Great Wall as early as in the Ming Dynasty(around 13th century). At that time, however, bricks were made by hands and its productivity was very low. To meet the increasing need for bricks, people in industrial period invented the brick making machine. However, modern people are more and more dissatisfied with the speed of the traditional brick making machine. Fortunately, now we finally witness the appearance of a new type of brick making machine: the high speed automatic brick making machine.

             

            永久免费观看的毛片视频下载
              <dd id="4v7md"><pre id="4v7md"></pre></dd>

                1. <button id="4v7md"></button>