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1 修订后的建筑用砂石国家标准 2 0 0 1年新版本业已出版发行 ,并于 2 0 0 2年 2月 1日起在砂石生产企业正式施行。目前由有关部门主办的培训班正在不少地方开课 ,也包括砂石的主要用户 (各预拌商品混凝土站及工程公司的混凝土试验室等 )参加了培训班。有人提出建筑用砂石标准
1 The revised national standard for construction gravel 2001 has been published and has been officially implemented by gravel production enterprises since February 1, 2002. At present, the training courses organized by relevant departments are being started in quite a few places. The main users of sand and gravel (including the concrete laboratories of ready-mixed commercial concrete plants and engineering companies) also attended the training courses. Someone put forward the construction sand and gravel standard