Poppet valve:

Engine valve deriving its name from its motion of popping up and down. It is also called ‘mushroom valve’ due to its shape like a mushroom.

Related posts:

  1. Personnel Management
  2. Operative Functions
  3. Administrative Role of PM
  4. Competency
  5. HR Management
  6. Role Change
  7. Personnel Policies
  8. Personnel Procedures
  9. Appealed Policies
  10. Implied Policies
  11. Specific Policies
  12. Personnel records
  13. Research
  14. Pure research
  15. Personnel research
  16. Attitude or Opinion Survey
  17. Turnover
  18. Secondary research
  19. Applied research
  20. Personnel audit