1The general distributions of trace elements in Chinese coalsBAI Xiang-fei, LI Wen-hua, CHEN Ya-fei, JIANG Ying1-42The research on the application of pitch in feedstock for coke makingLIU Jiong, FU Li-jun, ZHANG Yong-qiang5-73The characters and variation of carboniferous-permian coal in Tongxin CoalmineGAO Li-xin8-94Enhancing coal quality management and stabilizing coal product qualityGAO En-fu, WANG Zuo-qiu, SUN Yue-qin, CHI Li-hua10-125The sampling, preparation and analysis management for incoming coal of Guohua Electric PowerZHOU Ning13-156Enhancing coal quality management and enhancing check for coal quality responsibilitySHENG Chang-zeng16-177Suggestion on standardizing work of coal quality testing and spot-checkWANG Yu-xin, WANG Zhong-min18-198Discussion on undermine materials management in Panjiang CoalmineXIE Cheng-ji20-219Study on difference between the International Coal Classification Standard and Chinese Coal Classification StandardLUO Yun-fei, CHEN Ya-fei, JIANG Ying22-2410The testing and verifying of alternative methods of total sulfur determination in cokeLI Yan-jun, CHEN Mei-li25-2611Reason analysis of deviation in sampling and preparation of commercial coalZHAO Lin27-2812CNAL T0279/T0280/T0281/T0282 proficiency testing of year 2006YANG Hua-yu, LI Ying-hua, DENG Xiu-min29-3213Analysis on uncertainty of the testing result of dried basis ash in coalMA Quan-sheng33-3514The development and correct application of γ-ray coal ash content apparatusHE Feng36-3715Discard iron way and apply of magnetic separatorCHEN Jian-sheng, YANG Gang38-4016Discussion on energy conservation measures of automatic determination instrument of sulfurZHAO Yong-rui, ZHU Fei-li, PAN Xiu-ren, CHANG Ying-ying40-4117Analysis of influence factors on determination calorific value of coalXING Xiu-yun, GU Hong-wei42-4418Discussion on drawing plastometer layer cruve with ExcelLI Shu-wei, LIU Yan-hong, WANG Han-qing, WANG Jian-kui, ZHANG Guang-min44-4519The present status and prospect of coal preparation mechanical equipment in ChinaZHAO Jin-zhong46-47,5420Application of LWZ1200×1800 screen-bowl centrifuge in coal slime dewateringZHANG Chang-ming, JIANG Chang-hai, YAN Wen-yan, SHAN Gang, YAO Qu-long, WANG Wei-wei48-50 