以下为句子列表：
英文: The ZK320 Automatic BOOKcover Gate-folding Machine is designed mainle for the following functions:to trim the edge of the covered books according to the book size, to score and fole the bookcover so as to complete the edge folding process.
中文: ZK320自动书籍勒口机的主要功能是将上封装订后的书本按尺寸裁切前口、封面压痕、折页，从而完成书封前口的折页工序。
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