Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 191
29 1L j 180 QUESTIONS AND ANSWERS ON … FIG i»7 PUMPS AND PUMPING MACHINERY. 181 A. Fig. 118 illustrates a vertical ammonia pumpwhich occupies but little floor space. 631. Q. How is it possible to pump ammonia?A. Because it is in liquid form previous to expan-sion in a refrigerating system. 632. Q. Describe the Emerson pump? A. The main…
Pumping machinery
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