安全阀滑阀孔  relief valve spool bore

第三滑阀  third spool

三滑阀  three-spool

三滑阀电磁阀  three-spool solenoid valve

三孔滑车  dead eye; dead-eye

三孔滑轮  deadeye

滑阀孔  spool bore

开孔滑阀  porting spool

喷油阀阀孔清洁  fuel injection valve orifice cleaning

安全阀滑阀  relief valve spool

安全阀滑阀入口  relief valve spool inlet

铲斗控制阀滑阀  bucket control valve spool

超速阀滑阀  overspeed valve spool

电磁阀滑阀  solenoid valve spool

吊钩马达控制阀滑阀  hook motor control valve spool

辅助制动阀滑阀  secondary brake valve spool

减速器控制阀滑阀  retarder control valve spool

减压阀滑阀  pressure reducing valve spool

快速响应阀滑阀  quick-response valve spool