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