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