The aperture can be countersunk on {HEAD ~ either the first or second surface} of {TAIL ~ the bone plate}, or both, to accommodate a direct engagement with the bone screw 
The aperture can be countersunk on { HEAD ~ either the first or second surface } of { TAIL ~ the bone plate } , or both , to accommodate a direct engagement with the bone screw
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH