wherein the slide valve and control passages are so arranged that the working medium, at high pressure, passes through the crankcase regardless of whether {HEAD ~ the piston machine} is operated as {TAIL ~ an engine} or as a working machine, 
is operated as
wherein the slide valve and control passages are so arranged that the working medium , at high pressure , passes through the crankcase regardless of whether { HEAD ~ the piston machine } is operated as { TAIL ~ an engine } or as a working machine ,
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH