WOODEN BOXE STC  REDUCTION GEAR REDUCTION RATIO 1?10 HS CODE:8483409000 TORQUE MOTOR CONTROLLER HS CODE:8410901000 TORQUE MOTOR OUTPUT SPROCKET HS CODE:8425319000 REDUCER INPUT SPROCKET HS CODE:8425319000 DRIVE CHAIN HS CODE:7315111000 RACK HS CODE:730840