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a(chn)ƷB JRp|(zh)ߏˮľм(f)a(chn)Ʒɷǽٗlװ^ͷǽٱM_e≥20ϰ
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JRp|(zh)ߏˮľм(f)a(chn)Ʒɷǽٗlװ^ͷǽٱM_e≥20ϰ(ni)Ϟ48Kg/m3xIJްS`ܶSƫ^±4s|(zh)3Ҙ˜Ҫ0.3%ϵ(sh)NRC1õͬrһW(xu)bǰɇͿNɫMҕXҪ
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≥37dB
ܶȣ 44kg/m2
ʹÉ 20
Ɖdɣر(sh)13.5
_ܣ _6Οo؞ͨѼy
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http://www.szyuhui.cn/shuinishengpingzhang/263_2313.html
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