This is achieved by using components that are subjected to pressure, pressing the elastically deformable sheet of metal against projections that are located at a height corresponding to approximately half way up {TAIL ~ the hub supports} in {HEAD ~ the direction} of the piston head  
This is achieved by using components that are subjected to pressure , pressing the elastically deformable sheet of metal against projections that are located at a height corresponding to approximately half way up { TAIL ~ the hub supports } in { HEAD ~ the direction } of the piston head
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH