| 摘要 |
A landing leg (10) is disclosed which includes telescopic upper and lower parts. Within the upper part (12) there is a drive system (26, 28, 30, 32, 42, 44). This system transmits drive either from a manual handle fitted to a shaft (18) or from a gearbox and motor combination (48) to a crown wheel which is mounted on a vertical shaft. Rotation to the vertical shaft is converted to vertical movement of the lower leg part. |
