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"GB/T 7251.10-2014" standard !
This GB standard english version is not ready translated, only after get your order, then we translate it, time usually need more 3-5 days .
Low-voltage switchgear and controlgear—Part 5-3: Control circuit devices and switching elements—Requirements for proximity devices with defined behaviour under fault conditions (PDDB)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (Including motor protector)
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