Buckle folding: Method of folding sheets of paper where the sheet is bent or Buckled by a metal plate.

栅栏式折页(梳式折页)：用金属栅栏把纸张弯曲屈折的方法。

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The slurry gushed with such force it buckled a quarter-inch thick metal plate and would have trapped Mr Whipps, the inquest was told.

BBC: Essex farm workers 'overcome by slurry'