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        ׽ոѿijʵԥ͹߽һ
        Ҫ׽ոѿܽзвʵȽ׽ոѽз8mmµķɸɸѡ30sԭϷηֲ6810mmֱʵԴ˻ȡĿ6mmԭռ10%3-6mmԼ20%,С3mmȳ70%ڿDZȽϷҪ
        ڽ׽ոѿijܵʵҪָ꼰У
        1й׽ոѿڴÿ5ӽȡһȻǵԭϺˮʵIJͬҪӺˮϵⶨҪӦõĹʽУQ3600[m(1-H)/t(1-0.2)]QΪСʱmΪȡƷ
        2ȼָܺ׽ոѿ1tȼҪĵⶨΪW=1000P/QWΪСʱȼܺPΪÿСʱ
        3ɸ׿׾Ϊ6mmɸɸֲгⶨΪX=ma/mb×100%XΪmaΪɸmbΪ
        4׽ոѿ;ȡɸֺԼ1000gתת500תȻȡƷɸֻɸʱIJⶨʽΪC=m2/m1×100%CΪе;M2Ϊתɸֻm1ΪȡƷ
        5ܶͨҪ׽ոѿܶȴ1.0g/cm³ǿԸݰ׵ˮԭͨӱؼֱӲֵ
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