{TAIL ~ A weakened zone} of {HEAD ~ said tube section} is automatically broken during lift off by a mechanism applying a tensile stress to the section 
{ TAIL ~ A weakened zone } of { HEAD ~ said tube section } is automatically broken during lift off by a mechanism applying a tensile stress to the section
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH