1) secondary brake relief valve
辅助制动安全阀
2) secondary relief valve
辅助安全阀
3) secondary brake valve
辅助制动阀
4) supplemental steering relief valve
辅助转向安全阀
5) secondary brake valve spool
辅助制动阀滑阀
6) auxiliary valve relief valve setting
辅助阀安全阀调定
参考词条