Zimmer frame

noun

1. 齐默式助行架
   a metal frame that people use to help them to walk, for example people who are old or who have sth wrong with their legs

1. （老人或病人用的）齐默助行架
   A Zimmer frame or a Zimmer is a frame that old or ill people sometimes use to help them walk.

in AM, use 美国英语用 walker