1.德国灰砂砖大砌块的发展背景:作为全世界发展灰砂砖水平最先进的德国,早在1854年前德国的莱比锡用木制的杠杆压力机成型,经自然养护在世界上首先生产了灰砂砖。1908年德国颁布了世界上第一个灰砂砖产品的标准。之后经过数次的技术革新,目前德国现有生产灰砂砖的工厂300多家,20 1. German limestone brick large block development background: As the world’s most advanced limestone brick development in Germany, as early as 1854 in Leipzig, Germany with a wooden lever press forming, by the natural conservation in the world first Production of lime sand brick. In 1908 Germany promulgated the world’s first standard lime sand brick products. After several technological innovations, the current production of lime sand bricks factory in Germany more than 300, 20