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