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IEC 9/1444/DC
Survey and call for experts and project leader - TS 50537-4: Railway applications - Mounted parts of the traction transformer and cooling system - Part 4: Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with conservator for rail vehicles
CLC/SC 9XB/WG 26
Gas and liquid actuated relay for traction transformers and reactors (Buchholz relay)