As shown in FIG 7, {TAIL ~ each saw kerf} 42 is aligned with {HEAD ~ a passage} 38 
As shown in FIG 7 , { TAIL ~ each saw kerf } 42 is aligned with { HEAD ~ a passage } 38
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH