The lifting assembly 46a is driven by the DC motor 132 via {HEAD ~ the ninety degree gear boxes} 134, 134a and {TAIL ~ the common shaft} 138 
The lifting assembly 46a is driven by the DC motor 132 via { HEAD ~ the ninety degree gear boxes } 134 , 134a and { TAIL ~ the common shaft } 138
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH