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Chidule cha chitukuko ndi mawonekedwe a vacuum circuit breaker
[Mwachidule za chitukuko ndi makhalidwe a vacuum circuit breaker]: vacuum circuit breaker imatanthawuza wodutsa dera amene ma contact amatsekedwa ndi kutsegulidwa mu vacuum.Zowononga madera a vacuum zidaphunziridwa ndi United Kingdom ndi United States, kenako zidapangidwa ku Japan ...Werengani zambiri