Hydraulic concrete cutting saw.
https://www.youtube.com/watch?v=fxqr2VBMo-g
Previously:
https://www.homemadetools.net/forum/...502#post170045
https://www.homemadetools.net/forum/...764#post159749
https://www.homemadetools.net/forum/...626#post139675
https://www.homemadetools.net/forum/...514#post101747
https://www.homemadetools.net/forum/...2114#post75761
