Lego bridge girder machine - GIF
It's hard to beat the Lego Liebherr LR 11000 crane, but here we have a Lego bridge girder machine. I believe this is technically known as a "launching gantry".
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Here's a real-life version of this machine, the legendary SLJ900/32:
https://www.youtube.com/watch?v=zvuufBqp0_4
More:
https://www.youtube.com/channel/UC2v...aOPQUXw/videos
https://en.wikipedia.org/wiki/Launching_gantry
Previously:
Lego Liebherr LR 11000 crane
https://www.homemadetools.net/forum/...780#post105366