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一、三牙轮钻头型号齐全。
常规型号为:37/8(98mm),45/8(118mm),57/8(149mm),6(152mm),61/2(165mm),71/2(190mm),77/8(200mm),81/2(216mm),91/2(241mm),97/8(250mm),105/8(269mm<span style="FONT-FAMILY: '宋体'; COLOR: rgb(0,0,0); FONT-SIZE: 10.5pt;