In {TAIL ~ normal operation}, {HEAD ~ an inner oblique surface} 46 of the seal cover 24 meets a corresponding inner oblique surface 47 on the lip 37 of the vessel 31 
In
In { TAIL ~ normal operation } , { HEAD ~ an inner oblique surface } 46 of the seal cover 24 meets a corresponding inner oblique surface 47 on the lip 37 of the vessel 31
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH