It allows {HEAD ~ one extremity} of {TAIL ~ crank arm} 6 to reach the interior or drum 5, where it connects to crank handle 5 via an articulated joint bearing 17, as illustrated in FIG 2 
It allows { HEAD ~ one extremity } of { TAIL ~ crank arm } 6 to reach the interior or drum 5 , where it connects to crank handle 5 via an articulated joint bearing 17 , as illustrated in FIG 2
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH