hand truck       
noun [ C ] US uk/ˈhænd ˌtrʌk/ us/ˈhænd ˌtrʌk/ (UK sack barrow, sack truck)
 手推运货车
a piece of equipment for moving heavy objects that has two wheels and a flat piece of metal at the bottom, and a handle at waist height
  He loaded the delivery on a hand truck and wheeled it down the hall. 他把货物装在一辆手推车上,然后推过大厅。 
 - More examples
 - Bring a hand truck to help you move boxes more quickly.
 - They pushed the hand trucks to and from the machines, unloading empty cans and picking up full ones.
 - A deliveryman pushing a hand truck charged along the sidewalk.
 - Election workers stood watch over a hand truck carrying boxes stuffed with ballots.