{HEAD ~ The driving bevel gear} is mounted on {TAIL ~ the lower end} of the transmission shaft and is mounted rotatably in the bearing seat  
{ HEAD ~ The driving bevel gear } is mounted on { TAIL ~ the lower end } of the transmission shaft and is mounted rotatably in the bearing seat
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH