1Status and development of coal international standardizationLUO Yun-fei, JIANG Ying1-32Present status and development of standardization work of coal detection methodsSHI Yu-ying4-5,253The result bulletin and analysis of national supervision checking of steam coal product in the fourth quarter of year 2005MI Sai-ming6-84Enhancing coal quality management and improving the economic benefitZHU Yun, CAO Zhi-chuan9-115Strengthening the technological improvement to reduce the moisture of cleaned coalGAO Guang-hui11-126Experience of dealing with quality dispute about commercial coalSUN Chang-qing13-147The discussion of ensuring using coal enterprise to obtain eligible coalLI Qian-kun, ZHAO Chun-yu15-168Application of mathematical statistic methods to quality management in coal preparationYU Xiao-yu, JIAO Yong-quan, FU Feng-rong17-199Coal to olefin - a new process for the ethylene industryTIAN Yun-sheng20-2210Experimental study of the culture new strains by inducing rhodopseudomonas spheroids and application to Biodegradation and Transformation of CoalWANG Ai-mei, WANG Long-gui23-2511Status and development of coal fines size measurement technologyMA Hui26-2812The check analysis of substitution method for measurement of nitrogen in coals and the evaluation report on deviation of single measurementSHI Ying-hui, YANG Lin, FENG Jin-yan29-3113Study on coal characteristic of ash and total sulfur in Chahe mining areaZHANG Jie32-33,5514The method and technique of preparing microspecimen for coal petrological analysisYANG Xiu-qin34-3615The discussion of mechanical sampling for coking coalDING Yu-xian, YANG Xiu-hua, WANG Gang-ren37-38,4416The influencing factors and countermeasures for the accuracy of determining total sulfur by Eschka methodLIU Li-ping, ZHI Shun39-4017Influence of some factors on determination of calorific value of coalWANG Du-tao41-4218The quick determination of ash yield of commercial coal in Aiyou MineFU Chong-sheng, PIAO Zheng-gen, XIAO Yu-juan, LU Jie43-4419Debugging, analyzing and disposing of malfunction on the electronics orbit weighing apparatus of digital typeZHU Hai-feng45-4620The application of pressureless feed three products dense medium cyclone in Huaibei Mining GroupHUANG Huai-bei, YAO Wei-min47-50 