At least a portion of the powder is mechanically attached to a surface of the cavity, where the mechanical attachment of the powder allows a portion of {HEAD ~ flame retardant particles} of {TAIL ~ the powder} to protrude beyond the surface and not be completely embedded therein 
of
At least a portion of the powder is mechanically attached to a surface of the cavity , where the mechanical attachment of the powder allows a portion of { HEAD ~ flame retardant particles } of { TAIL ~ the powder } to protrude beyond the surface and not be completely embedded therein
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH