词汇	roller chain idler
释义	roller chain idler 链传动惰轮
随便看	material-object statements material object training laboratory material obstacles material of adsorption Material of Chinese Philosophy History material of construction material of cutting-tool material of cutting-tools Material of die core material of differential type material of difficult machining Material of drought resistance material of ethyl alcohol extraction material of exegetical studies Material of ferromagnetic material of fishing gear material of fuse-element material of garment material of ground floor material of high thermal conductivity material of hydrogen storage material of infrared window material of integral type Material of label material of liquid crystal