This lets Biomason substitute things like mine tailings for part of the sand that would otherwise be used.

这让 Biomason 可以用尾矿之类的东西来代替原本可以使用的部分沙子。

" We use urban construction waste, mine tailings and urban solid wastes as raw material.We sort them by category and we transform them into a special printing ink."

“我们使用城市建筑废料、矿物残渣和城市固体垃圾来作为原材料，然后分类挑出来，将它们转化为特殊的打印墨水。”