三级头

三级头三级头
  1. 对TARIM油田DH1-5-7油井中使用97天的三级泵下端泵头腐蚀原因进行了分析.第三,三个级;

    The corrosion failure of a three-stage pump 's down part used for 97 days in DH 1-5-7 oil well of Tarim oil field was analyzed simply .