IS:4064 - 1967 (with amendment no.1 - 1983) : Specification for Normal duty Air-Break Swithces and Composite Units of Air-Break Switches and Fuses for Voltages not Exceeding 1000 Volts

IS:4064 - 1967 (with amendment no.1 - 1983) : Specification for Normal duty Air-Break Swithces and Composite Units of Air-Break Switches and Fuses for Voltages not Exceeding 1000 Volts - New Delhi BIS 1967 - 21+2p

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