| 摘要 |
A trailer unit for an articulated vehicle, which trailer unit has a raisable and lowerable front end ground support, and a security system which includes a key operable switch (12, 14) enabling operation of a motor for driving the ground support, the switch (12, 14) being incorporated into an electrical circuit which includes a battery (58) and an alarm device (62, 64) which is operated if an attempt is made to raise or lower the ground support without insertion of a key in the key operable switch. <IMAGE> |
