of all commutators, all telegraph, telephone, signal, and power limiting and indicating equipment, pole lines and supports for signal, ... It being provided, however, that under no circumstances shall railroad electrical workers do any construction or reconstruction work ... and all generating devices, auto transformers, compensators, welding and drilling machines, also operating cranes in metal-trade shops.
|Title||:||Handbook of American Trade-unions|
|Author||:||United States. Bureau of Labor Statistics, Estelle May Stewart|