sentences:  These sets are distinguished by an orange stripe on the front gangway doors between the headlight clusters.In September 2004, JR-West unveiled the 3-car "U@tech" (you, Urban Network, ubiquitous, future + technology) experimental EMU converted from former Kawasaki Heavy Industries KuMoHa 223-9001, which was the prototype of the 223-2000 series and Seto-Ōhashi Line 213 series cars.This set is used to test and develop new technology for use on future narrow-gauge trains.