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