论文部分内容阅读
秘鲁的一个小城中有许多泉眼,泉水向地面喷涌。泉水中含大量石灰质,时间一长,就会沉淀凝固。当地人把泉水引入制砖的模子
There are many springs in a small town in Peru, and the spring gushes to the ground. Spring water contains a lot of lime, a long time, it will precipitate solidification. The locals introduced spring water into the brick making mold