概况（1）国家建筑材料工业局硅酸盐建筑制品质量监督检验中心于1996年第2季度对全国蒸压灰砂砖产品质量进行了国家监督抽查，实际抽查了57家企业的57个产品，主要抽查北京、河北、江西、河南、浙江、湖北、广东、四川等省市的企业，占全国生产企业的32％。（2）蒸压灰砂砖是一 Overview (1) In the second quarter of 1996, the Quality Supervision and Inspection Center of China’s Building Materials Industry Bureau conducted a national supervision and inspection of the quality of autoclaved sand-lime bricks, and sampled 57 products from 57 companies. Major sample companies in Beijing, Hebei, Jiangxi, Henan, Zhejiang, Hubei, Guangdong, Sichuan, and other provinces and cities, accounting for 32% of the country’s production enterprises. (2) The autoclaved lime sand brick is a