needle valve assembly 针阀总成

needle-tubing assembly 针导管配套装置

needle-roller assembly 滚针组

cage and needle roller assembly 无套圈有保持架滚针轴承 ; 无套圈带保持架的滚针轴承

Needle Seat Assembly 针座组件

Cage And Needle Rolling Assembly 无套圈有保持架滚针轴承

needle valve and seat assembly 进油针阀及座总成

needle and bottom damping assembly 针与底部阻尼系统