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  ______    _____    _____       ___              
 /_____//  |  ___|| |  __ \\    / _ \\      ___   
 `____ `   | ||__   | |  \ ||  | / \ ||    /   || 
 /___//    | ||__   | |__/ ||  | \_/ ||   | [] || 
 `__ `     |_____|| |_____//    \___//     \__ || 
 /_//      `-----`   -----`     `---`       -|_|| 
 `-`                                         `-`

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發送短信 : Optimal energy transfer pipe arrangement for acoustic drill string telemetry