The frame, {TAIL ~ spool} and {HEAD ~ ratchet wheel} can be defined from aluminum alloy 
The frame , { TAIL ~ spool } and { HEAD ~ ratchet wheel } can be defined from aluminum alloy
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH