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The ends should be dressed as to avoid sharp edges or cross threading.
两端需穿着，以避免尖锐边缘或跨线程。
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Variation of the screw Angle results in reduction of purchase of the locking interface, or cross-threading the head.
螺钉角度的变异会致使锁定界面的减少或跨螺纹的头。
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