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For Packing the Piston Rods and Valve Stems of Steam Engines and Pumps.
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The passage continued lower down, on the Piston's far side.
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Attach the piston rod to the piston, and insert piston in cylinder.
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Blacken the piston rod in a candle flame to prevent solder adhering.
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There's four different movements of the piston to make the bike move.
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Then in 1956-57 he undertook post-graduate study at Harvard University with Walter Piston.