| 摘要 |
The invention relates to a box in which the screws (2) of the metal dogs (3) comprise a coating (21, 22) on at least one section of the length thereof. Each one of said screws (2) comprises, on a first section close to the front end thereof, a first coating (21) and, on a second section closer to the head of the screw (2), a second coating (22). Said coating material, which is a polyamide, provides a locking torque of the metal dog (3) relative to the screw thereof (2). The box (1) comprises between each of the longitudinal channels (13) thereof and the respective side cavities (16) a separation wall (17) parallel to the corresponding screw (2) and aligned in the sidewise direction with an intermediate portion of the screw (2) comprised between the sections bearing the first coating (21) and the second coating (22). |
