Hague, Charles Arthur · New York : McGraw Publishing Company · leaf 173
be •I … w I bo s GASKILL PUMPING ENGINE 141 years, by the direct acting advocates; which all goes to showthat low duty means simplicity of machinery, and high dutymeans more complicated machinery; the main question beingwhere to draw the line so as to balance the account to a rea-sonable extent. The…
Pumping machinery
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