A worker who has to go around several racks to collect a certain number of objects uses a trolley for this. But if the racks are too high, a ladder has to be used, which is time consuming and makes a worker perform a lot of unnecessary operations. To address this issue, the trolley was coupled with the stepladder. The spring mechanism lowers the stepladder when a worker steps onto the first step and raises it when a worker gets off. If needed, the stepladder can be equipped with a handle for lowering.
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