Two or more folds parallel to each other with adjacent folds in opposite directions, resembling the bellows of an accordion. Alternative term: fanfold.

两(以)平行摺以不同边方式连接，类似手风琴腔。

In the old days, a designer working on an airplane wing handed a bunch of punch cards to the computer operator and waited a week to get back thousands of numbers on fanfold paper.

那时候，一设计飞机机翼工程师会把一大堆穿孔卡片交给电脑操作员，等一星期才能拿回来成千数字，而且是写在复写纸。