Technicians work on controls and record data at Richfield oil refinery in Watson,California.
Watson California USA Date:1938, December Duration:3 min 0 sec Sound:NO SOUND
A technician works on controls and enters monthly operational data at Richfield oil refinery in Watson,California. Technicians read and record data from a number of meters. A vacuum evaporation meter and crude meter shows readings. On the basis of the recorded data a graph being printed.
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