| 21. | The surge tank is connected to plant by penstock.
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| 22. | Penstock ( input pipes ) diameters are between.
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| 23. | In the photograph above, the left-hand penstock is the newer one.
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| 24. | All post-World War One penstock pipes were manufactured in the United States.
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| 25. | A steel penstock connects the reservoir intake at the dam site to the conduit.
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| 26. | Before reaching the power station, water will be transferred by six long penstocks.
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| 27. | Water from the lake is conveyed to the units through penstocks and branch lines.
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| 28. | Other workers would have to leave the penstock and get fire extinguishers from outside.
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| 29. | The underground manifold, where individual penstocks feed the plant's 8 units.
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| 30. | Every unit has a diameter, each penstocks.
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