书套折叠单元 (BOOK COVER FOLD UNIT)

开启式曼哈顿折叠样式 (OPEN MANHATTAN FOLD) (mm)
闭合式曼哈顿折叠样式 (CLOSED MANHATTAN FOLD) (mm)
荷包折 (LEAFLET FOLD) (mm)
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标牌折叠 (TAG FOLD) (mm)
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书套折叠 (BOOK COVER FOLD) (mm)