How to use a computer (or ___)

screen capture, crop, mark / paint

video coures

vehicles

ultralights
everything cyclorotor (except what they are good for)
[VTOL, engines, sailboats, electric bikes, folding bikes]

energy

absorption and emissivity table
misc solar - redrok
misc solar - builditsolar
a selecive emitter
[stirling, other heat engines, solar thermal]

misc

engineering toolbox

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