小推车 is a generic 'pushable small cart' — covers shopping carts (
购物车 is more specific), hospital trolleys, food carts at airports/streets, and old-style wheelbarrows. The famous saying
淮海战役的胜利是用小推车推出来的 ('the victory at Huaihai was pushed out by wheelbarrows') refers to peasants supplying the PLA with handcarts in 1948.
