plunger adapter是什么意思

用法例句

Considering the problem that different diameter combined tubing are adopted and conventional plunger lifting no longer applies in deep well,this paper presents a kind of new relaying type plunger gas-lift equipment applied to upper large down junior combined tubing.

提出了一种应用于上大下小组合油管柱的新型接力式柱塞气举装置。