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1. Isingeniso kubakaki bePolyurethane bavela njengokukhetha okuthandwayo kokufakwa kwamapayipi wamakhemikhali ngenxa yezimfanelo zabo ezihlukile. Banikela ngokuqina okungenakuqhathaniswa, ukumelana kwamakhemikhali nokugqwala, ukuguquguquka, nokusebenza kahle. Ake sihlole lezi zinzuzo ngokuningiliziwe.