The rear perforations are visible on the cut edge.
后方齿孔都是看得见，对切缘。
Partial perforations do not run the full size of the printed piece.
部分穿孔不运行的全尺寸的印件。
Partial perpendicular perforations do not run the full size of the printed piece.
部分垂直穿孔不运行的全尺寸的印件。
Parallel perforations run in the same direction that the paper travels through the press.
平行穿孔运行在同一方向的文件，通过新闻传播。
Perpendicular perforations run in the opposite direction that the paper travels through the press.
垂直穿孔的运行方向相反的文件，通过新闻传播。
During surgery, such perforations allow passage of bacteria from the surgical site through the punctures.
在手术中，这种微小穿孔可使手术部位的细菌通过穿刺孔。
During surgery, such perforations allow passage of bacteria from the surgical site through the punctures.
在手术中，这种微小穿孔可使手术部位的细菌通过穿刺孔。
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