This invention relates to a drilling screw and execution method for fixing a gypsum board to {HEAD ~ a thin steel plate} by utilizing {TAIL ~ this drilling} screw 
This invention relates to a drilling screw and execution method for fixing a gypsum board to { HEAD ~ a thin steel plate } by utilizing { TAIL ~ this drilling } screw
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH