开孔钻头 选购指南
660mm 26寸牙轮钻头 开孔钻头
一、三牙轮钻头标准尺寸: 直径:89mm 117.5mm 140mm 149mm 158.8mm 165.1mm 200mm 215.9mm 212.7mm 209.6mm 222.2mm 241.3mm 244.5mm 250.8mm 269.9mm 311mm 355.6mm 406mm 444.5mm 508mm 660mm 等各种尺寸 二、牙轮钻头IADC代码 镶齿系列:HJ417-637 钢齿......
一、三牙轮钻头标准尺寸: 直径:89mm 117.5mm 140mm 149mm 158.8mm 165.1mm 200mm 215.9mm 212.7mm 209.6mm 222.2mm 241.3mm 244.5mm 250.8mm 269.9mm 311mm 355.6mm 406mm 444.5mm 508mm 660mm 等各种尺寸 二、牙轮钻头IADC代码 镶齿系列:HJ417-637 钢齿......