Abstract The necessity of the shush pump with forward rotating of drilling rig is analyzed,advantages and disadvantages of various transmission plan were compared and described.

　
英 美
  • 分析了石油鉆機中使鉆井泵正轉的必要性；對實(shí)現正轉的各傳動(dòng)方案進(jìn)行了對比分析；簡(jiǎn)述了各種傳動(dòng)方案的優(yōu)缺點(diǎn)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan