最好在活塞周面环槽底开有补偿槽，通过补偿槽与补偿孔连通。

It is better to have compensation slot at the bottom of the piston surrounding ring slot to connect with the compensation hole through the compensation slot.

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对补偿绳脱槽的原因进行了分析，并有针对性地提出了预防措施。

This paper analyzes on the reasons of the compensation ropes jumping from slot, and advances some preventive measures.

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最后提出了管材激光割缝时槽宽尺寸精度控制的补偿原则。

At last, the authors give a compensation principle for dimensional accuracy control of grooving kerf width with laser beam for seamless pipe.

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