buckle fold

基本解释

Folding is based on one of two principles:knife- folding or buckle- folding , and the two may be combined in.
折纸的原理不外乎两个：刀氏折或山氏折，这两个方式可以结合于一部机上。
Parallel folding can be operated for two times with the buckle plates. Its mode of folding includes parallel fold, concertina fold and letter fold.
在采用栅栏折页时可进行两次平行折页，折页方式为平行折、风琴折、包芯折；
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Knife folding method of folding sheets of paper by means of a knife pushing the sheet through a pair of inwardly rotating rollers see buckle folding.
刀式折页用刀把纸推过一对向内旋转的滚轴而把纸屈折的方法。参阅栅栏式折页。