Once a year at night contractors work with the museum staff to clean the airplanes, railroad car, stage coach and beacon in NPM’s atrium. The work has to be done at night so there is room to move around the large lift safely and it takes several hours over two nights. Plywood is placed under the lift to protect the museum’s marble floors from damage.Annual Atrium Cleaning - YouTube | |
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| Education | Upload TimePublished on 9 Nov 2015 |
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