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(1)


ӦЩ
    һ߲ܽʵ֤ڸ߲ܽеӦǾúģرǽձõͬ
rtys17.info,www11ssscomС˵,www.48riocm    ڼᣬ佨ĵΪСԿש콨ȣͬĽͬĵ£𺦳̶һש콨ڴ7ƻ

(2)


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

(3)


ǽıЧ൱490mmשǽıЧںĽЧͻо
    ġʵػͬػ£rtys17.info,www11ssscomС˵,www.48riocmIJ࣬ Ҫȱ󣬵ģͣ¶˼ʺгϣ¶ȴ80ĻᡢΣĻ;ڳʪĻرںӦע⡣

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