根据国家标准化管理委员会、国家经济贸易委员会分别以国标委计划[2002]41号文和国经贸厅行业［2002］73号文，中国建材工业协会下发2002年制修订建材国家标准和行业标准项目计划项目118项。其中，国家标准项目计划67项（强制性国标4项，推荐性国标63项），行业标准项目计划共 According to the State Standardization Management Committee, the State Economic and Trade Commission, respectively, with the national standard project [2002] No. 41 and the State Department of Trade and Industry [2002] No. 73, China Building Materials Industry Association issued 2002 revision of national standards and industry standard building materials project There are 118 projects planned. Among them, the national standard project 67 (mandatory national standard 4, recommended GB 63), the industry standard project plan