henchman;lackey;hired thug是什么意思

用法例句

This paper analyzes malfunction of rod pumps emerged during operations in high deviated wells in Yangjiaba Oilfield, and points out that the main factors on production in such wells are inclination angle and dogleg.

分析了杨家坝油田大斜度井有杆泵生产过程中产生故障的原因,指出影响大斜度井生产的主要因素是井斜角和狗腿度。