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