With the single unwinder, the time for changing the paper or aluminum is the same, but this change should be done at high frequency because the substrata consumption is very high. 如果只配有一個(gè)開(kāi)卷機，雖然換紙或鋁箔的時(shí)間是相同的，但是由于面層材料的消耗很大，所以更換的次數會(huì )非常頻繁。
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