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