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2: http://science.howstuffworks.com/oil-drilling.htm Introduction - How Oil Drilling Works http://science.howstuffworks.com/oil-drilling1.htm Finding Oil http://science.howstuffworks.com/oil-drilling2.htm Preparing to Drill http://science.howstuffworks.com/oil-drilling3.htm Oil Rig Systems http://science.howstuffworks.com/oil-drilling4.htm Drilling http://science.howstuffworks.com/oil-drilling5.htm Testing for Oil http://science.howstuffworks.com/oil-drilling6.htm Extracting The Oil http://science.howstuffworks.com/oil-drilling7.htm ( Lots More Information ) โดย: นักเคมี [1 ม.ค. 2552 15:58] |