单词：medium temperature coal tar
单词：medium temperature coal tar 相关文章
According to the latest data from the General Administration of Customs (GAC), China's net import(净出口) of coal hit 103.43 million tons in 2009. Last year, China exported 22.40 million tons of coal, down 50.7 percent year on year, while its coal
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By Paul Thompson Broadcast: October 12, 2003 (THEME) ANNCR: People in America, a program in Special English on the Voice of America. Every week we tell about a person who was important in the history
VOA2003（下）-美国人文故事
BEIJING, Feb. 25 (Xinhua) -- China's safety watchdog said Monday it will no longer approve new coal mines that do not meet production capacity requirements in 2013 in order to ensure work safety. High-gas coal mines with an annual production of less
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By David Byrd San Antonio, Texas 04 April 2008 The men's U.S. college basketball tournament is down to four teams: North Carolina, Memphis, UCLA (University of California at Los Angeles) and Kansas. Action gets under way Saturday at 2200 UTC in the s
VOA常速英语2008年（四月）
中国富煤缺油少气的能源资源特点，造成能源消费主要依赖于煤炭，石油则主要依靠进口，而且带来一系列环境问题。煤清洁转化技术则可以帮助缓解这一难题。近日专家表示，我国将在2020年
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