drill grinder head钻磨头
internal doublerun drill grinding head内圆磨头
auger drill head螺旋钻头
Drill head quantity动力头数量
auger r drill head螺旋钻头
small drill head小钻头
air hydraulic drill head气动液压钻头
multiple spindle drill head多轴钻削头
Petroleum Drill Head石油钻头