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