从４月１日起,生产经销ＩＳＯ实验砂将暂时执行新规定。国家建材局行业管理司日前为此发出通知,要求各省、自治区、直辖市建材主管部门,各标准砂定点经销单位,各企、事业用户单位,中国建筑材料科学研究院,福建省岚非标准砂联销公司,中国标准砂厂严格规范ＩＳＯ实验砂的生产经销 From April 1, production and distribution of ISO test sand will temporarily implement the new regulations. The Administration Department of the State Administration of Building Materials issued a notice to this day, requesting the departments of building materials of provinces, autonomous regions, and municipalities directly under the central government, the sand distribution agencies for various standards, the enterprises and business users, the China Academy of Building Materials Science and Technology, and Fujian Non-standard Sand Joints. Sales company, China Standard Sand Factory strictly regulates the production distribution of ISO test sand