钻头直径Ｄiam.ofBit(mm)切削齿CuttingwingsPDC数量PDCQty(片)(Pieces)水孔螺纹尺寸Screwsize形状shape数量Qty数量Qty直径Diam.φ25半片PDC钻头HalfpiecePDC整片PDC钻头CompletepiecePDCbit21-215mm14×1.512×216×2φ2721-21φ282-31-2-1.51-45-2mmφ302-31-2-1.51-4φ322-31-2-1.51-4φ422336mm)