rolamite / ˈroʊ ləˌmaɪt /

⚽高中词汇润华

rolamite 的定义

n. 名词 noun
  1. a simple, almost frictionless mechanism consisting of a flexible metal band formed in an S-shaped loop around moving rollers: used in innumerable devices, including thermostats, odometers, brakes, and electromechanical weapons.