Thus, the recess 26 of the container 12B confronts {HEAD ~ the recess} 26 of {TAIL ~ the container} 12C, and these two recesses 26 form a vertically elongated, substantially hexagonal through hole which penetrates in the horizontal direction, as shown in FIGS 3 and 4 
Thus , the recess 26 of the container 12B confronts { HEAD ~ the recess } 26 of { TAIL ~ the container } 12C , and these two recesses 26 form a vertically elongated , substantially hexagonal through hole which penetrates in the horizontal direction , as shown in FIGS 3 and 4
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH