sprocket
noun /ˈsprɒkɪt/
/ˈsprɑːkɪt/
- (also sprocket wheel)a wheel with a row of teeth around the edge that connect with the holes of a bicycle chain or with holes in a film, etc. in order to turn it
Topics Engineeringc2链轮;输片齿轮 - enlarge imageone of the teeth on such a wheel
链轮齿;链齿 Topics Engineeringc2
词源mid 16th cent. (denoting a triangular piece of timber used in a roof): of unknown origin.