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ɽʡdʯӢɰ؟(z)ι˾ > ԭϡo > ̫ԭʯӢɰ

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    l(f)˾ɽʡdʯӢɰ؟(z)ι˾

    ؛10000

    “(lin)ϵˣ

    l(f)؛c(din)ɽ ø^(q)

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    Ч20130926

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    ;Vڲұ𡢽zĥϵȹI(y)

    ӢQuartz sand

    P(gun)]PʯӢɰʯӢɰSʯӢɰ^Va(chn)ʯӢɰO(sh)ԴʯӢɰ

    Ϣ

    ɽʡdʯӢɰ؟(z)ι˾ʼڹԪ1995ռ15஀F(xin)ЌI(y)g(sh)ˆT8a(chn)̎ʯӢɰոɰͨɰȻʯӢɰ2fVTʯӢɰɰPʯӢɰƺʯӢɰ^VˮʯӢɳӣW(xu)νɰ݆T졢ĥollБ(yng)늠ttrͿϡƌW(xu)о(gu)I(y)I(lng) S|(zh)ǰÑǰu(y)ǰԭtr(ji)l(f)؛r(sh)Ҏ(gu)RȫǢ㡢(sh)k\(yn)MЈ(chng)L(zhng)󣬱Sñ؃(yu)|(zh)a(chn)ԭ_l(f)®a(chn)Ʒ߮a(chn)ƷnΡ Ҫa(chn)ƷƺʯӢɰ^VˮʯӢɰˮ̎ʯӢɰʯӢɰʯӢɰɰ{ʯӢɰʯӢɰմʯӢɰ,ͽ(ji)ܲʯӢɰTʯӢɰɰPʯӢɰ;ʯӢɰƺʯӢɰȶNϵЮa(chn)Ʒ̖(ho)70-100Ŀ40-70Ŀ20-40Ŀ8-16Ŀ5-7Ŀ4-6Ŀȵȡ “(lin)ϵ(jng) “(lin)ϵԒ\

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    a(chn)Ʒԣ
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      ɽʡdʯӢɰ؟(z)ι˾ʼڹԪ1995꣬ռ15஀F(xin)

      2021-03-10

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