Ukwenza ngendlela oyifisayo ikesi le-aluminium ngokuvamile kuqala ngedizayini yangaphandle, kugxilwe ezicini ezinjengosayizi, umbala, izingidi, nezibambo. Nokho, ingaphakathi lecala lidlala indima ebalulekile ngokulinganayo, ikakhulukazi ekuqinisekiseni ukuvikelwa, ukusebenza, kanye nesethulo sisonke...
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