喷油泵柱塞偶件 meaning in English

plunger and bare of injection pump

Plunger of diesel fuel injection pump part 1 : technical specifications
柴油机喷油泵柱塞偶件.第1部分:技术条件
Plunger of diesel fuel injection pump part 2 : performance test method
柴油机喷油泵柱塞偶件.第2部分:性能试验方法
Technical specification for plunger mating parts of fuel injection pump of marine diesel engines
船用柴油机喷油泵柱塞偶件技术条件