In {TAIL ~ a second embodiment}, {HEAD ~ a pair} of holes are formed through the base plate of one of the scroll members 
In
In { TAIL ~ a second embodiment } , { HEAD ~ a pair } of holes are formed through the base plate of one of the scroll members
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH