{TAIL ~ a second sleeve} surrounding the first mentioned sleeve and of a material substantially more resistant to wear than the first sleeve; the cover being molded on the yoke, and forming {HEAD ~ a separate element} complementarily fitted to the yoke 
{ TAIL ~ a second sleeve } surrounding the first mentioned sleeve and of a material substantially more resistant to wear than the first sleeve ; the cover being molded on the yoke , and forming { HEAD ~ a separate element } complementarily fitted to the yoke
TAIL 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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH