{HEAD ~ Each} of the shaft slots 47 c is formed in {TAIL ~ a respective slide wing 47 b} at an incline of 45° 
is formed in
{ HEAD ~ Each } of the shaft slots 47 c is formed in { TAIL ~ a respective slide wing 47 b } at an incline of 45 °
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH