Appendices A and B of the Determination Method of Cement Specific Surface Area (GB/T 8074-2008) are informative appendices. This standard is proposed by China Building Materials Federation. This standard is under the jurisdiction of the National Cement Standardization Technical Committee (SAC/TC 184). The drafting unit of this standard: China Institute of Building Materials Science. The drafting units of this standard: Wuxi Jianyi Instrument Machinery Co., Ltd., Shaoxing Kent Machinery Electronics Co., Ltd., Hebei Kexi Instrument Equipment Co., Ltd. ... The main collaborating units of this standard: Beijing Shunfa Lafarge Cement Co., Ltd., Shandong Huayin Special Cement Co., Ltd., China Cement Development Center Physical and Chemical Testing Institute, etc.