steam boiler (4 photos)
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steam boiler with pressure valves in the basement of the old mint (san francisco), basement, pipes, pressure valves, san francisco old mint, steam boiler
steam boiler with pressure valves in the basement of the old mint, san francisco
steam boiler furnace, bolivia, casa de la moneda, casa nacional de moneda, furnace, mint, minting, potosí, steam boiler
steam boiler furnace
steam boiler - morgan, orr & co, bolivia, casa de la moneda, casa nacional de moneda, furnace, mint, minting, morgan, orr & co, pipes, potosí, steam boiler, valves
steam boiler, morgan, orr & co
pressure valves on steam boiler, pressure valves, san francisco old mint, steam boiler
pressure valves on steam boiler