牵链输送机 drag chain conveyor

牵引链 [机] [矿业] drag chain ; haulage chain ; tow chain ; pulling chain

牵链子者 bear leader

牵链运送机 drag chain conveyor

链状牵开器 chain retractor

牵引链输送机 [机] drag-chain conveyor

牵引链轮 driving chain sprocket ; traction chain-gear

无链牵引采煤机 [矿业] chainless hauled shearer

无链牵引 chainless haulage