Butterfly valves sun dace da bututun da ke jigilar nau'ikan watsa labarai masu lalata da marasa lalacewa a cikin tsarin injiniya kamar iskar gas, iskar gas, iskar gas, iskar gas, iska mai zafi da sanyi, narkewar sinadarai, samar da wutar lantarki da kariyar muhalli, kuma sune saba a...
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