orifice de passage /SCIENCE,ENG-MECHANICAL/
[DE] Ventilspalt
[EN] valve port
[FR] orifice de passage
orifice d'écoulement,orifice de passage /ENG-MECHANICAL/
[DE] Durchflussoeffnung
[EN] flow-through hole; flow-through opening
[FR] orifice d' écoulement; orifice de passage