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Maboksi flexibla Alumini duct hewa ni linajumuisha tube ndani, insulation na koti. 1. Bomba la ndani: hutengenezwa kwa bendi moja ya foil au mbili, ambayo ni spiral kujeruhiwa karibu na waya high elastic chuma; The foil inaweza kuwa laminated Alumini foil, aluminied PET filamu au PET filamu. Hii...Soma zaidi»