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