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qovdŮͬ,www.a.vvv.com,www.uu999.cno.

    dzʹΪ㷺ܶһΪ500 kg/m3600 kg/m3ҪʹڽṹеǽǽеأܶΪ700 kg/m3800 kg/m3ڽоṹеqovdŮͬ,www.a.vvv.com,www.uu999.cno.أ¿ܶһΪ300 kg/m3400 kg/m3Ҫڽﱣ¸ȣǽ嶼Ǽӽ;ͬͬƷҪ

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ӦЩ
    һ߲ܽʵ֤ڸ߲ܽеӦǾúģرǽձõͬ
qovdŮͬ,www.a.vvv.com,www.uu999.cno.    ڼᣬ佨ĵΪСԿש콨ȣͬĽͬĵ£𺦳̶һש콨ڴ7ƻ

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ʱֻ6Ͳƻ1975꺣ǵʱ30റ׻չ΢ڽש콨;1976ɽʱа׼ׯһ¥ؽ700kg/m2ʱڵҶΪ6ǿ£ûгµѷ죬50mIJϽṹסլ²ȴбѷ졣
    Ϻıܺã200mm

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ǽıЧ൱490mmשǽıЧںĽЧͻо
    ġʵػͬػ£qovdŮͬ,www.a.vvv.com,www.uu999.cno.IJ࣬ Ҫȱ󣬵ģͣ¶˼ʺгϣ¶ȴ80ĻᡢΣĻ;ڳʪĻرںӦע⡣

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