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公开(公告)号：US11613290B2
公开(公告)日：2023-03-28
申请号：US16388773
申请日：2019-04-18
摘要： A hand-truck frame system includes a main frame, a bed frame, and pair of multi-wheel assembles coupled to the main frame and rotatable to provide improved climbing capabilities over certain terrain, such as stairs. The multi-wheel assemblies can have four wheels radially mounted about respective hubs of the first and second multi-wheel assemblies.
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