Imbali: Umlinganisi unembali engaphezulu kweminyaka eyi-100. Ngowe-1866, i-Siemens yaseJamani yenza ijenereyitha. Kwiminyaka emine kamva, umntu waseKhanada, uHenry Martinson, wafumana ilungelo elilodwa lomenzi wendlela yokulinganisa, esungula ishishini. Ngo-1907, uGqr. Franz Lawa...
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