单体式喷油器夹持器固定螺栓
unit injector clamp retaining bolt
石油管螺纹硬质合金长方形刀片
carbide rectangular threading insert for petroleum pipe
石油管螺纹硬质合金三角形刀片
carbide triangular threading insert for petroleum pipe
石油管螺纹硬质合金扇形刀片
carbide segment threading insert for petroleum pipe