SCRUBBER STACK AT THE SOUTH 40 AREA OF NASA LEWIS RESEARCH CENTER
The Rocket Engine Test Facility (RETF) exhaust scrubber removed contaminants and muffled noise (1964).
Image Credit: NASA/PAUL RIEDEL
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https://www.nasa.gov/image-detail/grc-1964-c-70688/
Image CreditNASA/PAUL RIEDEL
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