Horizontal Directional Drilling and Microtunneling-a Comparison of Two Successful Pipe-Laying Methods with Regard on their Strengths and Weaknesses是什么意思_Horizontal Directional Drilling and Microtunneling-a Comparison of Two Successful Pipe-Laying Methods with Regard on their Strengths and Weaknesses在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句