| 摘要 |
<p>Suitcase has a collapsible frame attached to its undersurface. This frame consists of two arms pivoted together and carrying rollers at their extremities. When the arms are extended they form a trolley which supports the suitcase. The frame can be locked in any desired position by a bolt which is actuated through a Bowden cable operated by a button on the handle of the suitcase. The height of the suitcase above the ground can thus be adjusted to suit the user making it easier to push and pull the suitcase.</p> |
