What is the definition of Precious Engineering?

"Precious engineering" is like the high-end, artisanal gadget you find in a museum - it's not just any ordinary piece of tech, but a masterpiece of human ingenuity that's so intricate and beautiful it could make a Renaissance artist weep with envy. It's the kind of engineering that takes years to master, like a Swiss Army knife, but instead of knives, it's made of silicon, copper, and the sheer willpower of a genius.

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Here's an unsettling example sentence: "The 'precious engineering' of the old clock tower's gears whispered secrets to me, as if they were plotting a world domination scheme using time dilation."