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Old 06-07-2017, 02:58 AM
Novelty Bobble Novelty Bobble is online now
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Join Date: Nov 2009
Location: South East England
Posts: 6,640
I agree we have a rather vague set of criteria here but I'd put forward a modern jet engine.

Simply from a point of view of multiple components, challenging material requirements, harsh environment, long life and mass production. It is effectively a commodity in a way that some of the other (perhaps even more complex) low-volume items are not.