The two through {TAIL ~ holes} 144 are disposed on {HEAD ~ the two first protruding portions} 141 a respectively and are kept away from the first edge 141 at a distance 
The two through { TAIL ~ holes } 144 are disposed on { HEAD ~ the two first protruding portions } 141 a respectively and are kept away from the first edge 141 at a distance
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH