A detailed model of a crankshaft connecting rod and piston mechanism.

A hand holds the trigger of a homemade mousetrap made from wire and wood, with two coiled springs standing upright on the board. The name 'IVAN JTKERA' is handwritten vertically in the bottom right corner of the wooden base. The trap is set against a plain white background, and shadows of the trap's components are cast on the wood.

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