| 摘要 |
The sign board is formed from one or more ground units (1), or from several earth anchoring arrangements. A lowerable mast (14) is provided at its upper end with sign holders (15), slotted profiles (16), sign profiles (17,18) and the signs. - After the signs have been fitted, the complete mast assembly is raised by one or more free-standing winches against vertical stays (12).(6) |
