Then, {HEAD ~ the flat jack} 44 is inflated which compresses the elastic block 47 and raises {TAIL ~ the rod} 45 so that the rib 49 of the rod passes through the aperture 53a 
raises
Then , { HEAD ~ the flat jack } 44 is inflated which compresses the elastic block 47 and raises { TAIL ~ the rod } 45 so that the rib 49 of the rod passes through the aperture 53a
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH