Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 131
120 QUESTIONS AND ANSWERS ON … 1 i»L J.|^T PUMPS AND PUMPING MACHINERY. 121 424. Q. Why are special precautions taken toprevent leakage from such a pump? A. Because ammonia is expensive, and it is notsafe to inhale it even when mixed with air. 425. Q. Do all parts of an ammonia pump wearin about the same proportion as on other…
Pumping machinery
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