由于导卫装置采用传统连接方式与轧机紧固一体，因传动链长、固定支点多，在生产中经常出现松动、卡死等现象，诱发轧制事故。
The original guide fittings, which fixedly combined with the rolling mill, because of long drive chain and many fixed points, usually become flexible and seizing, bring on rolling accident.
在钢铁行业中，滚动导卫装置为轧制生产线上一关键装置。
In the Iron and Steel industry, roll guide equipment is a part in rolling product line.
上阶梯垫装置和下轧制线调整装置是补偿工作辊和支撑辊直径磨损减小的装置。
Upper step wedge and lower pass-line adjustment unit serve to compensate wear of WR diameter and BUR diameter.
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