Main products are drill and screw, which almost cover all the sizes and configurations.
主要产品是钻头和螺杆，我们提供几乎所有型号和结构。
The ground test replacement screw drill.
地面测试更换螺杆钻。
The air screw drill tool was power equipment which was designed for air drilling.
空气螺杆钻具是专为空气钻井而设计的动力装置。
Place the remaining end of the machine screw into the chuck of a drill press.
放入钻床夹头螺丝余下的1月底的机器。
Place the remaining end of the machine screw into the chuck of a drill press.
放入钻床夹头螺丝余下的1月底的机器。
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