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