... 3. JB/T3943.1-1999 criterion name:carbide Circle line drawing dies material:carbidethe min order:1piecemanufacture factory the wire ... the bolt moulding, straight tube mould, shrind perch mould1, for manufacturing all sorts of screw and bolt according to the standard ... of China, American, Japan and Germany.2, For manufacturing all sorts of materials stainless steel bolt,bolt screw and ...