A device 10, {HEAD ~ wherein the second closing means} is provided with {TAIL ~ a sealing lip} abutting the cam surface  
A device 10 , { HEAD ~ wherein the second closing means } is provided with { TAIL ~ a sealing lip } abutting the cam surface
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH