Also, a third flow path may be provided, generally parallel to {TAIL ~ the first and second flow paths}, and include throttling apparatus through which {HEAD ~ fluid} must pass to communicate along the third flow path 
Also , a third flow path may be provided , generally parallel to { TAIL ~ the first and second flow paths } , and include throttling apparatus through which { HEAD ~ fluid } must pass to communicate along the third flow path
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH