rotary-plunger pump

• 旋转柱塞泵,旋转式柱塞泵

rotary-plunger pump的用法和样例：

例句

1. This article innovatively proposed the relay-like plunger lifting installment and has designed the structural.
   与常规柱塞举升相似，组合油管接力式柱塞举升包括井口部分和井下部分。