Ngemva kweminyaka ecishe ibe ngu-3 yocwaningo nentuthuko, izinga lokushisa eliphakeme lika-Jiuyu injini yezinga lokushisa eliphakeme lama-microwave akhelwe ngaphakathi aphila isikhathi eside ekugcineni asesigabeni sangaphambi kokukhiqizwa.Lawa ma-synchronous motors akhelwe ngaphakathi ama-microwave aphumelele ukuhlolwa kwempilo okudlulele kanye nokuhlolwa kwezinga lokushisa eliphezulu.Lezi zimoto ezincane ezingama-220v ne-synchronous motor encane engu-120v zisebenza kahle kakhulu kuma-microwave akhelwe ngaphakathi.