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70度防火閥 防煙防火閥 鍍鋅防火閥
排煙防火閥，70度防火閥，電動防火調節閥，防煙防火閥70度防火閥用在空調送風、通風系統管道上；平時常開，發生火災時關閉，聯鎖 		2020-09-03
280度防火閥，常開型防火閥，電動防火閥
排煙防火閥 排煙防火閥，消防部件，一般安裝在機械排煙系統的管道上，平時呈關閉狀態，發生火災時開啟排煙，當排煙管道內煙氣溫 		2020-08-27
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