深圳高等职业技术学院的研究员杨敖先生曾陪同一位德国同行在国内参观。在一建筑教学实习基地,这位德国专家对我们凭经验作业的「水泥搅拌法」感到十分惊讶:干了,倒点水;稀了,再掺点料。这位德国人说,在德国,水泥什么号,何时出厂,加多少水、泥、沙,都有严格的配比与程序。你们这么不讲 Mr. Yang Ao, a researcher at Shenzhen Polytechnic, accompanied a German colleague to visit China. In a building teaching and training base, the German expert was very surprised by our “cement mixing method” of working experience: dry, pour water; dilute, then mixed with materials. The German said that in Germany, cement, what number, when the factory, add more water, mud, sand, there are strict matching and procedures. You do not speak so