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What is the function of this hole?
这个空洞的功用是什么？
youdao
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The whole process is finished automatically, can also be equipped with hole-punching function.
整个过程全自动完成，也可以选配冲孔功能。
youdao
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The whole process is finished automatically, can also be equipped with hole-punching function.
整个过程全自动完成，也可以选配冲孔功能。
youdao