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2007年5月15日到17日,中国石油工程建设协会第四届理事会第二次会员代表大会在浙江省杭州市召开。来自中国石油天然
From May 15 to 17, 2007, the second member congress of the 4th council of China Petroleum Engineering Construction Association was held in Hangzhou, Zhejiang Province. From China’s oil natural