{HEAD ~ a deformable connecting interface} between the axle and {TAIL ~ the guide arm} which, because of a deformable nature, facilitates lateral displacement of the axle relative to the guide rail ; and 
between
{ HEAD ~ a deformable connecting interface } between the axle and { TAIL ~ the guide arm } which , because of a deformable nature , facilitates lateral displacement of the axle relative to the guide rail ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH 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