Kuyaziwa yibo bonke, ukwenza i-valve yosayizi omkhulu kuyinzuzo ye-ZD valve ngaso sonke isikhathi, besilokhu senza amaphrojekthi amaningi amakhulu we-butterfly valve amashumi eminyaka, lapho sibhekene nobhubhane lwe-Covid-19 ngo-2022, nakuba kunzima, konke abantu be-valve ye-ZD baqhubeka nokusebenza kanzima ngezikhathi ezithile futhi ...
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