§ 56.19090 - Dual signaling systems.

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§ 56.19090 Dual signaling systems.

There shall be at least two effective approved methods of signaling between each of the shaft stations and the hoist room, one of which shall be a telephone or speaking tube.

                    
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§ 56.19090 - Dual signaling systems.

§ 56.19090 Dual signaling systems.