Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 408
Portable Hccording Pressure Gauges. This light, compact, portable recorder has been exten-sively used by gas companies for recording pressures.The absence of muUii)lying devices, bearings and othercomplicated mechanism insures accuracy and sensitive-ness, and dependability even when roughly handled.
Architecture · Building · Construction industry · Engineering
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