| 摘要 |
A walled holding plate of a tool cart includes a bottom portion having a rectangular gap on each corner thereof, wall portions projecting upright from the edges of the bottom portion, and extension plates projecting upright from respective edges of the rectangular gaps of the bottom portion; each extension plate has through holes formed thereon; every two adjacent ones of the extension plates are secured to each other at tail ends; the walled holding plate is connected to wheeled upright supporting rods by means of screwing fixing elements into the through holes of the extension plates and selected ones of holes formed along the supporting rods; the walled holding plate can be relocated to other heights by means of connecting the extension plates to other ones of the holes of the supporting rods after the fixing elements have been undone.
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