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Fiber cloth for attach the back of a sound insulation panel or ceiling panel1.Aluminum mineral wool insulation panel used at keeping quiet. It can absorb the building noise.Aluminum glass wool test report:a.Raw material aluminum plate: Janzu rolling raw aluminum sheet is with good price advantage and high quality. We have exported such material to over 10 countries with more than 8 years’ experience.Each batch aluminum products aluminum cut sheet all with a certificate name out the material name and material test report. 2.Glass wool test report:National Grid Beijing Electricity Construction I