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中国非金属矿工业协会膨润土专委会四届四次会员代表大会于2005年8月31日～9月1日在浙江省临安市钱王酒店召开。
China Non-metallic Minerals Industry Association Bentonite special committee four four member congress on August 31, 2005 to September 1 in Zhejiang Province Lin’an Qian Wang Hotel was held.