
Low-voltage switchgear and controlgear - Control switches - Position switches 30 × 55 - Dimensions and characteristics; German version EN 50047:2019
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Low-voltage switchgear and controlgear - Control switches - Position switches 30 × 55 - Dimensions and characteristics; German version EN 50047:2019
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻