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Technology Developed in Texas Expands Natural Gas Production LEAM Drilling Systems, in Conroe, Texas, runs its trucks on compressed natural gas, or CNG. LEAM Vice President Scott Bradley said cheap natural gas makes the company's 18 CNG trucks a good
发表于:2019-01-13 / 阅读(84) / 评论(0)
VOA标准英语2012年(六月)
VOA标准英语2012年(六月)