Could be a jeweler or glass blower who uses it all for soldering. Glass blowers would use a set up like that. I use an oxygen concentrator and propane gas to solder because it works better for my soldering kit. I still have my old oxygen bottle. Need to take it back eventually. Concentrator might be outside because of noice or might be a broken down one. Looks like a shop to me.
Could be a jeweler or glass blower who uses it all for soldering. Glass blowers would use a set up like that. I use an oxygen concentrator and propane gas to solder because it works better for my soldering kit. I still have my old oxygen bottle. Need to take it back eventually. Concentrator might be outside because of noice or might be a broken down one. Looks like a shop to me.