泵的启动点、运行点、关闭点应该怎么说? opening points , operating point , shutting-down points cnki上的例句: this paper presents a method for determining the opening points and shutting-down points of travelling valve and standing valve on the basis of downhole pump card. 翻译是: 本文以井下泵功图为基础,给出游动阀、固定阀开启点和关闭点的确定方法。查看更多