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Brown - figure 395

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Four-way cock, used many years ago on steam engines to admit and exhaust steam from the cylinder. The two positions represented are produced by a quarter turn of the plug. Supposing the steam to enter at the top, in the upper figure the exhaust is from the right end of the cylinder, and in the lower figure the exhaust is from the left the steam entering, of course, in the opposite port.

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Documents: 507 mouvements mécaniques
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