IEC: 439 - 2 - 1987 (Amendment No.1 - 1991); Low-voltage switchgear and controlgear assemblies part 2 particular requirements for busbar trunking systems (busways)
IEC: 439 - 2 - 1987 (Amendment No.1 - 1991); Low-voltage switchgear and controlgear assemblies part 2 particular requirements for busbar trunking systems (busways)
- Geneva IEC 1991
- 9p
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