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    ծȯתü۸ļ㣬תߺܽܵˮƽͶʡһ˵ծȯתü۸ȡ򷽣Ϊڽծȯ֣ծ򵽺͵ǰгˮƽ൱ծȯ

ڵһγϢծȯݹծȯʵļ㹫ʽ(1)۸㹫ʽΪ
PM(1rN)/(1Rn)

ֵMƱrNʹndzծȯתü۸ȡˮƽRΪִθϢծȯ۸ļ㹫ʽΪ
PM(1rn)/(1Rn)

ܽܵˮƽһǺгӦгʸߵծȯתü۸пܵת÷ծȯ۸ת÷ͻᷢת÷ԳծȯҪﵽˮƽתծȯ۸ɸתծȯͶʼ㹫ʽ任Ϊ

P1P(1Rn1)L

P1ΪתüۣPΪת߹ծȯʱļ۸RΪת߳ծȯڼˮƽn1ΪڣLΪڳȡõϢRߣתü۸ߡ www.dianjin.com
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