Scroll fluid machine having {HEAD ~ scroll members} at {TAIL ~ each end} of a rotating hollow shaft 
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Scroll fluid machine having { HEAD ~ scroll members } at { TAIL ~ each end } of a rotating hollow shaft
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH