About: Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional Pacific...
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Here's a trick I learned while working construction.
If you plug two extension cords together like this, they won't come unplugged by accident.
When you're done they're easy to unplug.