Beautiful

(vía https://www.youtube.com/watch?v=yS2W40Lteuo)

Plasma cutter

A/C Compressor Prius II [2205×1560]

Source: https://openpics.aerobatic.io/

SoK Photographie

The Wankel Rotary Engine :

Converts pressure into rotating motion,all parts rotate consistently in one direction,as opposed to the piston engine,which has pistons violently changing direction.

Inside the gearbox of a gearhead lathe

Source: https://imgur.com/IaiLJSp

15.06.30

Rivers of fire, tapping a blast furnace at Ural Steel

Source: https://imgur.com/iBFYs3k

Engine cut-away

Source: https://imgur.com/oyuSs9b