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