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