rectifier test

At present,the formation test technology with the multiple flow evaluator(MFE) as the dominant,which accomplishes well opening and shutdown by hoisting up or setting down testing string,can not completely meet the requirements of the formation testing production and the safety and environmental protection for high-pressure oil and gas wells.

YKDL压控式智能井下电子多流测试器以开关井操作不动管柱为设计原则,采用微型电机作为驱动动力,进而控制开关机构的多次开关。

On vehicle testing methods and evaluating standard of dry clutch;

汽车干摩擦式离合器整车测试评价方法