| 摘要 |
<p>A hand truck has a front load platform, a rear load platform, and a pair of lower wheel assemblies and a pair of upper wheel assemblies. The load platforms and the wheel assemblies fold and nest into the frame of the hand truck, resulting in a stored position in which the thickness is approximately the same as the side rails of the hand truck. Raising and lowering of the front load platform causes the lower wheel assemblies to move back and forth from the operational position to the storage position. Likewise, raising and lower of the rear load platform causes the upper wheel assemblies to move back and forth from the operational position to the storage position.</p> |
