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