Compressed Air: Theory and Computations (Classic Reprint) - Tapa blanda

Sinopsis

Excerpt from Compressed Air: Theory and Computations

Compressed air has long held the field for rock drilling under ground, though electricity has several times attempted to get into that business. At one time it seemed that compressed air would prove the best motive power for underground pumps, but in more recent years the improvements in centrifugal pumps seem to give electricity the advantage.

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