| 摘要 |
<p>The device has recessed area (1) and an oblique section (2) glued or screwed on a side face of a plasterboard, where the recessed area is provided with an injection hole to introduce mortar sticks. The oblique section allows optimal filling of a cavity formed on the recessed area. A screwing zone is provided in the recessed area to ensure positioning of the mortar sticks into the injection hole.</p> |
