Thus, sealing {HEAD ~ engagement} is effected at the interface of {TAIL ~ the seal ring groove} and the seal ring as well as between the surrounding housing and the outward sealing surface of the seal ring 
Thus , sealing { HEAD ~ engagement } is effected at the interface of { TAIL ~ the seal ring groove } and the seal ring as well as between the surrounding housing and the outward sealing surface of the seal ring
OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH