What is This Thing on the Roof of Factory

What is This Thing on the Roof of Factory फैक्ट्री की छतों पर ये क्यों होता है? | why does wind ventilator place on roof of factory? | Most Amazing facts | Fact Edition Episode In this video, facts(rochak tathya/ रोचक तथ्य) you don't know Or facts you never knew. Today you will see this facts video in Hindi And together "फैक्ट्री की छतों पर ये क्यों होता है? | why does wind ventilator place on roof of factory?" And Top Engimatic Fact & 20 Most Amazing Facts to see this video And this video is gonna be very interesting so watch the video till the end And I hope you liked the Facts Edition episode 1 Your queries:- japanese pencil sharpener human tetris japanese game show japanese fungus subway experiment roof rainwater harvesting system how high rise buildings are built everything in its right place music video what did it cost everything how does this keep happening factory roof challenge what happened to this place how buildings are constructed what is the right thing to do how things are made in factories this is what dreams are made of #topengimaticfacts #amazingfacts #facts #factsinhindi #shorts #fact #world #ventilator