This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
indoor This is the HTFs hot train consisting of to the tee at the top of the heater radiation shutter valve diluent gas injector cooler mixer and nozzle. This is the HTFs hot train consisting of to the tee at the top of the heater radiation shutter valve diluent gas injector cooler mixer and nozzle.