[coal field logging league]October 19, 2007, 5-23 CHINESE GEOPHYSICAL SOCIETY in Qingdao University held its 23 annual meeting, I will Deputy Secretary-General, in Beijing Czech geophysical equipment to the British Institute of Deputy Chief Engineer Mr. Xu to the country were invited to participate in this meeting, and published in the professional papers presented at the "small-calibre logging in CBM logging of" thesis topic by the participating experts attention and praise。