年产400万块非承重空心砖生产线已于1989年6月上旬在甘肃省兰州沙井驿建筑材料工业公司建成投入生产。这是全省建成的第一条空心砖生产线。空心砖其优点是节约土源、重量较轻、并且能向大体积、高强度方向发展。此外,成本较机制普通砖低30％左右,可广泛使用于民用住宅以及临时工棚、仓库、车棚等建筑,用途广 The annual output of 4 million non-load-bearing hollow brick production lines was put into production at Shajingyi Building Materials Industry Co., Lanzhou, Gansu Province in early June 1989. This is the first hollow brick production line built in the province. Hollow bricks have the advantages of saving earth resources, lighter weight, and being able to develop in large volumes and high strength. In addition, the cost is about 30% lower than that of a mechanical ordinary brick, which can be widely used in civil houses and temporary sheds, warehouses, carports and other buildings.