単たん線せん運うん転てんMeaningsNoun1. single-track operationKanji used単single線line運carry転roll aroundComposed of単たん線せんsingle track (railway); single line; solid wire; solid-core wire; single-strand wireNoun運うん転てんoperation (of a machine); running; working; driving (a vehicle); use (of capital, funds, etc.); management; investmentNoun