Further, because of the pair of {TAIL ~ levers} 14, 14 having independent both ends, the spring forces at both ends are equalized, and so {HEAD ~ the shutter plate} 15 can be moved in such a manner as to automatically eliminate the formation of clearance in the transverse direction 
Further , because of the pair of { TAIL ~ levers } 14 , 14 having independent both ends , the spring forces at both ends are equalized , and so { HEAD ~ the shutter plate } 15 can be moved in such a manner as to automatically eliminate the formation of clearance in the transverse direction
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH