1Analysis on the influencing factors of determination of particle size of pulverized coal using laser particle size analyzerCAO Yi-Hua1-42Discussion on tolerance1 of ash of sample kept in common sampling and sample preparationXIE Bao-qing, CHEN De-fen, XU Xiao-song5-9,153Discussion onproblems for determining the precision of sampling and sample preparationYANG Hua-yu10-11,204The performance of sampling machine in the central part of the belt for coal asBAO Jun, ZHANG Lei, LI Xiao-jiang, QIN Ling, ZHENG Zhi-zhan, WANG Guang-pu12-155The influencing factors for determination of fluorine content in coal using ion-selective electrode methodZHANG Zhen, WEI Ning, LI Kan-she, YANG Zai-wen, LI Jin-juan16-206A type of non-abrasion deviation vector speed sensorYAO Yuan-shu21-247Debugging and Utilization of 5E-AC8018 isothermal auto-calorimeterYI Rui-ling, TANG Shan-hua25-26,308The testing differences of commercial coal at departure and arrival and countermeasuresYANG Xing-wei27-309Research on coal resources and coal quality characteristics of Ruineng Coal GroupWU Tao, LIU Jie-fei31-33,4410Analysis and calculation of ash influence on coking coal and coke pricesLIU Ming-rui, BAI Xiang-fei34-3611Factor Analysis of Heat Value Difference Problem Between Incoming Coal and Final Coal in Power PlantWU Shou-liang, YAN Zhi-feng, LI Chang-yong37-3912The commentary and comparison of closed coal storage facilitiesXU Jian-jun, ZHAO Li-juan, WANG Yan-sheng40-4413Disscusion on comprehensive utilization of Ceke coalWANG Hui-chun, LI Qing-kui45-48,5814Discussion of strengthening quality inspection process controlZHANG Chun-jiang, CHANG Xiao-feng49-5215Disscusion on the reconstruction scheme and coal blending in Xiyukou coal wharf of Wuhu harborLI Gan-wen53-5516Discussion on the measures of reducing the undersize fraction of lump coalWANG Jun-hong56-5817Discussion on coal petrography standard system and the problems in its applicationXIAO Wen-zhao59-6118Technical economy analysis of coalbed methane upgrading processing and utilizationZHU Ying-zhan62-6519Discussion on the application and practice of coarse slime secondary recovery processXIE Kai-hua, SUN Ying-lin66-6720Optimization of operation of clean coal pressure filter systemOU Dong-xiang, DONG Chen-gang68-69,71 