{HEAD ~ The desired tightness} is ensured in {TAIL ~ every case} in that the primary flange and the impeller shell are welded with one another 
is ensured in
{ HEAD ~ The desired tightness } is ensured in { TAIL ~ every case } in that the primary flange and the impeller shell are welded with one another
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH