Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 411
l{eeolJill^: rneiimatic Tachometers. For continuously recording the variations in the speedof shafting, machines, engines, etc. This patented pneu-matic type of recording tachometer consists of recordinginstrument, flexible connecting tube and revolvingmechanism. Special sprockets and chains are…
Architecture · Building · Construction industry · Engineering
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