摘要
旅行途中，你是否曾因推不动笨重的行李箱而满面愁云，或者勉强推动却累得大汗淋漓呢？来看看下面这款新型的省力箱子吧，它将助你一臂之力!
The first of its kind, this is the self- propelled suitcase that automatically provides power assistance when you encounter inclines or are straining to roll the suitcase. Sensors in the handle monitor how much force you are using to pull the suitcase and signal to electric motors in the wheels to engage when you are struggling, propelling the suitcase up to 3 miles per hour. The power assistance initiates only when the suitcase is in motion, the handle is pulled out from the suitcase,
