Referring to FIG 13, {TAIL ~ the cover} 2 is pivotally mounted on {HEAD ~ the supporting shaft} 7 on which a torsion spring 8 is mounted so as to urge the cover 2 in the A direction 
Referring to FIG 13 , { TAIL ~ the cover } 2 is pivotally mounted on { HEAD ~ the supporting shaft } 7 on which a torsion spring 8 is mounted so as to urge the cover 2 in the A direction
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH