混凝土小型空心砌块于十九世纪末首先在美国被发明和申请了专利,到现面已有百余年的发展史。最初的混凝土砌块成型机是什么样子的呢?有动力装置吗?多少钱能购买一台?图1、图2系1900年时,混凝土空心砌块成型机制造商在报纸上做的广告,从这两张图中,大致可了解到当初混凝土空心砌块的成型方式:成型时孔是水平的,与现在完全不一样;没有 Small concrete hollow block was first invented and applied for a patent in the United States at the end of the nineteenth century. Now it has a hundred years of development history. What is the initial concrete block machine? Power unit? How much can buy a? Figure 1, Figure 2 in 1900, the manufacturer of concrete hollow block molding machine in the newspaper ads, From these two figures, you can see roughly how the original concrete hollow block was shaped: the holes were level when forming, completely different from what they are now;