Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 134
O. For what service is this available? A. For oil refineries and chemical works, whereit is necessary to force air at light pressures throughoils, chemicals and liquids. 439. Q. Is the action of such a blower steady andpositive ? A. It can not be termed steady, as the air pistonmust be reversed at… … ?{<&?& 124 QUESTIONS AND ANSWERS ON
Pumping machinery
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