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