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Clip #: MF-31B-10
Library: TFA Network
Country: United States
1950s, Northbrook, Illinois, engineers, technicians, engineer / technician testing irons for fire resistance, Underwriters Laboratories Inc. UL, iron being dropped on wood board, engineer / technician performing impact test on television set screen and testing fire resistance on dismantled set, air heaters being covered with cheesecloth and being tested for fire resistance, machine twisting and untwisting cords to test whether maintains proper current, machine testing electrical switches for wear and tear, roofing materials being tested for fire resistance and how well wood underneath is protected, technicians flipping over fire damaged roof to inspect wood underneath
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