Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 411
EliHfrii Time Recorders. For recording electrically the time of mechanical move-ments and the operation of machinery. Especially valu-able for recording the operation of power plant equip-ment, valves, switches, pumps, tilt traps, automaticweighers, conveyors, circuit breakers, elevators,…
Architecture · Building · Construction industry · Engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
