| 摘要 |
A steel rod connector comprises a tube, a left nut and a right nut. The tube has an inner thread and a peripheral locking part, with the peripheral locking part having elongated checking holes. The left and right nuts secure a left and right steel rod, fastened to the tube, respectively. After inserting the left and right steel rods into the tube by left and right insertion lengths, respectively, the checking holes allow to judge immediately by eyesight whether the left and right insertion lengths have reached safe minimal values.
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