To obtain a tight seal of the hood on the sabot by simple measures, particularly without a thread, the shell of the hood is designed with {HEAD ~ a sealing rim} applying against {TAIL ~ a smooth annular zone} of the sabot 
To obtain a tight seal of the hood on the sabot by simple measures , particularly without a thread , the shell of the hood is designed with { HEAD ~ a sealing rim } applying against { TAIL ~ a smooth annular zone } of the sabot
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH