Elevator Control Relays Circa 1967 [4928x3264]

Combustion chamber of a liquid-propellant rocket engine [675×1013]

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

Matchbox Factory (1962)

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.

A casting mold for a wind turbine blade, courtesy r/Pics (1280 x 720).

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

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

An outboard motor (2340 x 4160).

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

WATCH: Glass is an Oscar-Winning Documentary Short on Dutch Glassblowing from 1958 (video)