压折痕和折页时要求使用一个模式纸型系统，因为硬的压痕线会使半透明纸在折页时产生裂痕。

When the pressure of creases and folds require the use of a pattern of printing system, because of indentation line will make translucent paper when in the fold.

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折页时，折刀把线推入折口。集帖后，加热把线融化，粘牢各书帖，然后裁边及作进一步加工。

At the time of folding, the knife will push the thread into the fold. After gathering, heat is applied to melt the trimming and forwarding.

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