ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate
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The Fastest Man-Made Object Might Be A Nuclear-Powered Manhole Cover Which Reached 125,000 MPH | Bored Panda
![ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate](https://pbs.twimg.com/media/FILakk9WYAMn6lQ.jpg)
ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate
![Microstructure, mechanical properties and microtexture of friction stir welded S690QL high yield steel - ScienceDirect Microstructure, mechanical properties and microtexture of friction stir welded S690QL high yield steel - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S104458031630835X-gr3.jpg)
Microstructure, mechanical properties and microtexture of friction stir welded S690QL high yield steel - ScienceDirect
![The fastest man-made object is a manhole cover that was blasted into space by an underground nuclear test The fastest man-made object is a manhole cover that was blasted into space by an underground nuclear test](https://cdn.zmescience.com/wp-content/uploads/2021/01/atomic_test-357x450-1.jpg)