Based on theoretical analyses and experiments, main reasons have been discovered that cause excessive impact load on the wrapper roll of down coiler.
在理论分析和试验研究的基础上，找出地下卷取机助卷辊冲击负荷过大的主要原因。
For leading the wrapper (21) to the roll being packed, there is arranged at least one creasing element (9).
为了将包装材料(21)引领至正被包装的幅卷，该装置中设置有至少一个折皱构件(9)。
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