| 摘要 |
The gypsum board (1) has cardboard facings with a recess, allowing the folding of a cardboard (3) in a zone of the recess, containing a padding tape (5), where the recess is formed by a rectangular countersunk hole (7) up to the middle of the board (1). A groove (6) arranged in one of the sides of the countersunk hole extends up to an opposed edge of the board (1) without completely traversing the board (1), and an adhesive material is applied on the other side of the countersunk hole. |
