摘要 |
<p>The assembly has a plate (1) installed on ground. An anchoring unit is connected to the plate, where the anchoring unit comprises a hollow cylindrical rod adapted to a wall of a cylindrical pre-hole (2). A cylindrical case (9) or a lining (7) is maintained without the cylindrical pre-hole in a zone located above the anchoring unit to a surface of the ground. The anchoring unit is returned to an effective position for extracting the assembly by a hand or a drawing unit presenting two alternative principal positions.</p> |