| 摘要 |
<p>The system (1) has two symmetrical faces inclined downwardly with respect to a longitudinal axis of the system, and two vertical plates screwed on both sides of the system. Each vertical plate includes a notch at the bottom, where the width of the notch is equal to the thickness of a double wall (2), so that the system remains attached to the double wall during pouring of concrete, and the system is made of wood.</p> |
