{HEAD ~ The holes} are covered by the wrap of {TAIL ~ the other scroll member} for the majority of the operational cycle of the scroll compressor 
{ HEAD ~ The holes } are covered by the wrap of { TAIL ~ the other scroll member } for the majority of the operational cycle of the scroll compressor
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH