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