{HEAD ~ A first pressure chamber} of {TAIL ~ the cylinder} is connected to a first supply line , for setting a smaller displacement volume while a second opposed pressure chamber is connected to a second supply line , for setting a larger displacement volume 
{ HEAD ~ A first pressure chamber } of { TAIL ~ the cylinder } is connected to a first supply line , for setting a smaller displacement volume while a second opposed pressure chamber is connected to a second supply line , for setting a larger displacement volume
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH