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1970s: Aerial photos are viewed with special glasses by a mapmaking compiler and, in an animation, a cantilever extension and a bridging extension are shown in 1973.


By Rick Ray

  • Stock footage ID: 26865976
Video clip length: 02:21FPS: 29.97Aspect ratio: 16:9
HD$791920 × 1080MOV751.8 MB
SD$65852 × 480MOV92.7 MB
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