Ƙofar wuta ta ƙarfe yana da kyakkyawan iska, kuma rufe yana cikin wuri kuma yana da ƙarfi. Sassan da ke jure lalacewa irin su kwalabe da dogo duk kayan aiki ne masu inganci, waɗanda aka gwada su don tabbatar da rayuwar sabis ɗin samfurin.

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