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product performance
Wind pressure resistanceGrade 9 p3≥5.0
Air tightnessGrade 6 1.5 ≥ q1>1.0
Water tightnessGrade 6 △p≥700
Sound insulationGrade 3 30 ≤ Rw+Ctr < 35
Heat insulationGrade 4 3.5 > k ≥ 3.0