For edgejoining, the mating surfaces must be flat and square to both faces of the board.
对于边的连接,对接面必须平整、方正(和相邻两面垂直)。
2
The bandage modules include an opening (119) on the front wall, a cutting edge (120) within the opening, and one or more module joining attachments (121) on said side walls (115) and (116).