Proper use of mill-type lamps

Mazda B mill-type lamps, available in the 25 and 50-watt size in the 115-volt class, and in the 50-watt size in the 230-volt class, are designed to fill the need for a lamp which will operate satisfactorily where the service is too severe for Mazda lamps of the regular construction. To those classes of service where severe vibration is encountered are the mill-type lamps particularly adapted.