... 钻杆拉力：drill pipe tension 钻杆接头台肩：shoulder of tool joint 钻杆接头螺纹规;接头样板：joint template ...
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The torsional strength of the drilling tools can be greatly increased by using the double shoulder tool joint.
双台肩钻具接头可大幅度提高钻具的抗扭强度。
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