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f PI In n LWA Hz W A rpm dB ① 50 61 0.12 2450 74 ② 0.13 2340 ③ 0.14 2210 ④ 60 77 0.13 2580 78 ⑤ 84 0.14 2440 ⑥ 93 0.15 2230 , Product Description Specification item value Applicable Industries Hotels...