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... ice found at the fire scene:
They glued a 5V battery to the upper end of a wooden clothespin. On the inside of the gripping part of the clothespin, they nailed two thumbtacks, one on top and one on the bottom, separated by a piece of stiff paper. The positive and negative terminals of the battery were connected to two wires, with the ends of the wires wrapped around the two thumbtacks.
"Can this little device really start a fire?" Zhang looked at the ordinary-looking clothespin o ...
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