GB/T 4193-1984 Method for measuring the density of the fine wire and ribbon of tungsten and molybdenum used in electric light sources and vacuum tubes (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 4193-1984
Scope
This method is applicable to the density determination of thin tungsten wires, molybdenum wires and thin strips used for electric vacuum devices and electric light sources with a diameter of φ20-300um.
GB/T 4193-1984 history
1984GB/T 4193-1984 Method for measuring the density of the fine wire and ribbon of tungsten and molybdenum used in electric light sources and vacuum tubes