如果说是铝罐制造答案绝对是肯定的。
In the case of an aluminum can the answer is an unqualified yes.
二重卷边是金属罐制造工艺流程中最重要的环节，卷封滚轮是封罐机上最核心、最重要的零件之一。
Double-seam is the most important link in canning manufacture technical process, and the seam roller is one of the most core and important components on the can seamer.
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