Kwiminyaka yakutshanje, kwinkqubo yeplastiki, indlela ethandwa kakhulu yokwenza, ukuqengqeleka kweplastiki. Ukubumba umqulu, okwakwaziwa njengokubumba okujikelezayo, ukubumba okujikelezayo, yindlela yokubumba i-thermoplastic hollow. Ukubumba umqulu kwaqala ngeminyaka yoo-1940s eUnited Kingdom, ukubumba umqulu kwaphuma ngo-188...
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