板的穿孔用1表示:孔的形状，2。光圈大小，3。孔的相互排列，4。投球，5。相对于板材边缘的穿孔排列方向。代码按上述顺序用符号和大小表示指定项目。本标准适用于穿孔板，与板材料无关。

The perforation of a plate is designated by 1: shape of the holes, 2. aperture size, 3. mutual arrangement of holes, 4. pitch, 5. orientation of the arrangement of the perforations relative to the edges of the plate. The code expresses the items of designation by symbols and magnitudes in the sequence above. The standard applies to perforated plates regardless of the plate material.