The piston machine illustrated in FIGS 1 4, which can be used as {TAIL ~ a compressor} or as {HEAD ~ an expansion motor} , will be described in detail hereinafter with reference to its use as a compressor, followed by a brief explanation of its use as an expansion motor 
The piston machine illustrated in FIGS 1 4 , which can be used as { TAIL ~ a compressor } or as { HEAD ~ an expansion motor } , will be described in detail hereinafter with reference to its use as a compressor , followed by a brief explanation of its use as an expansion motor
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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