![Many-Industrial-ventilation-fans-units-during-rotation.-Indoor-or-outdoor--cooling-or-heating-process.-60-fps-seamless-animation.](https://v1.cdnpk.net/videvo_files/video/premium/getty_203/thumbnails/istock-1078776626_small.jpg)
Many Industrial ventilation fans units during rotation. Indoor or outdoor cooling or heating process. 60 fps seamless animation.
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