De La Vergne Refrigerating Machine Co · New York : [The Company] · leaf 71
all thesedifferent causes combined we increase the efficiency ofour machines on account of the direct expansion alonefrom 20 to 25 per cent. The objection raised againstplacing the ammonia pipes direct into the rooms to becooled, that there is danger of leakage, we have met bya most perfect system… … 220 TON REFRIGERATING MACHINE.
Refrigeration and refrigerating machinery
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