I used to hitch rides to and from school on the back step of horse-drawn ice wagons.
当时,我常常在往返学校的途中搭乘在拉冰马车的后面。
英语百科
Iceman (occupation)
An iceman is someone who sells or delivers ice from a wagon, cart, or motor-truck.
The profession was formerly much more common than it is today. From the late 19th century to mid-20th century, in cities and towns icemen would commonly make daily rounds delivering ice for iceboxes before the electric domestic refrigerator became commonplace.