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Firewood rack needing no fasteners to assemble
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Welding system for a battery pack
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Process and apparatus for spot-welding a flexible welding board to a battery cell
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Key ring and screwdriver device
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Seal for cells containing alkaline electrolyte
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Battery maintenance system
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Method and apparatus for measuring the voltage and charge of a battery
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Seal for cells containing alkaline electrolyte
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Method and apparatus for charging a nickel-cadmium battery
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Intrinsically safe battery circuit
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Carrier for disc harrow
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Self-tightening disc gang
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Automatic-releasing cable control for harrow
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