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    Ъ(Parshall flume)ַQϲ:yoOԭˮߵČ

     

     

    VM.Cone1915Ŀ__ʼMе1922F.L.ParshallM˸Ե׃ˬFͨõİЪԺֶ؏ˮWƳ˳ߴ1Ӣ絽50ӢĸNˮ

     

    Ъ1929ľW˺Ӣʿӡ͢SҲ˸N͵ˮ۵OӋMˌЪˮ*ռˮ
    ԭ

         ȵԽҺλԽ;ԽСҺλԽһҺλc]д_ČPϵͬӵˮĴС߀cęMe¶ֲڶPȰbˮ߲ߵȱڻ۵ĿsڱęMeСˮλcČPϵҪȡQ߲۵Ď׺γߴͬӵˮ߲۷ڲͬͬҺλͬˮ߲۰DҺλͨ^yˮ߲ۃˮҺλٸˮ߲۵ˮλ---Pϵ
    

     

        ЪˮտsֱΔUɢֽMտsεIJ۵΃Aб,Uɢβ۵׵ăAбc۵෴,YDˆDʾ

    Ҫ_,һr,F=60cm, G=90cm; K=8cm, N--23cm,x=5cm, y=8cm; Eȶ,߳ˮλ0.1-0.2cm,һɲ1.00ˮoL۵׸Hĺ:

    oL,4H;

    oL,=(6^-8) H;

    ͬrˮۃ^ˮIJҲֱܴڲМyˮλyڲ۱Oú^yyˮױȲۙҪ20-25cmycˮۿƽõĽٹܻBӵľ߳۵3cmˮλںξ׶((2/3)̎ˮλںĩ5cmIJ۱̎ˮcc۵׸ҪRƽ,^yҪo©ˮF,нɳ,ϼw,s
    

     

    1ЪΠsߵărҞ߾Ҫˮ۵ĸֳߴʴ_Ҳ@һЩybßoȔMăc:ˮλpʧС(sߵķ֮һ)ˮмʹй̑B|Ҳ׺ӽٵӰСȵˮλӰ푱^С,ԱÁyrIˮIˮҺw

    2cӋʹĴСDҺλĸߵyˮйˮˮ늏SsˮˮˮˮŷVIUˮŷԼˮ̺rI

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