Headed by Wang Qinfang, assistant to general manager of Xuzhou Mining Group, a delegation with the membership of leaders from Guizhou Company, Guizhou Qianyuan Energy-development Company, Rongguang Mining Company, Huaqiu Mining Company, Xinglong Mining Company and Tongzi County Government paid a visit to Baijigou gas drainage site where they studied CAMDA technology in gas drainage and use. Experience in gas drainage was also exchanged.
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