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40crA䓲2012-10-23
40crAʲô@һ}҂ṩY1.ʲô40crA40crA䓣˜GB/T3077-20082.40crA䓻Wɷ֣̼C0.370.44Si0.170.37iMn0.500.80SSຬ0.035ס
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40crAՓ2012-10-19
40crAՓ40crA Փ 40crA Փ5.5 0.186 13 1.046 0.222 14 1.216.5 0.26 15&am
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27simnAՓ2012-10-11
27simnAՓAֱdՓ kg/mAֱdՓkg/m5.50.186131.046<****vAlign=top****?ce...<>
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45#ΈAc45#AһN2012-10-08
45#ΈAc45#AһNð ȥɷNA䓺һ䌍Ȼ҂ɷN45#A䓅^e45#ΈA䓣DzϵһNӹˇڽٲָǞ_һΠһWܡ
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AӋ㹫ʽ2012-10-08
AӋ㹫ʽͨrAӋ㹫ʽ=0.00617*d*d*L=0.00617*ֱ*ֱ*LͬӵÿAՓ=0.00617*d*dֱLȾA䓘˜LՓW=we*ܶ=3.1416*d^2/4*L*ܶ=[
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Sa40CrA䓴ˇ40crܽB2012-10-04
Sa40CrA䓴ˇ40crܽB40CrA䓴ˇ40Cr850,ػ520,ˮ40CrӲȞHRC52-60_HRC48-5540crܽBWܣȦb(MPa)
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ʲô̼YAʹ̼YA䓵ĺ̎Щ2012-09-27
ʲô̼YAʹ̼YA䓵ĺ̎Щ|̼ؽY䓺Q̼YAwv京̼С0.08%c̼|^ЇĻWɷֲҪCWָлs|^͵ă|̼
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16mnʲô?FЈ16mnҲҊ,@ô?2012-09-06
16mnʲôFЈ16mnҲҊ@ô16Mnǣ16MnеͺϽߏȽY䓵ͺϽߏȽY䓣̼0.1%-0.25%,ҪϽԪiC≺⁵ĺϽ<3%ȷ֡
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16mnA䓻WɷּWӵ2012-08-30
16Mn䓲еһN|^ȥ䓲ĵһNз16Mn䓌̼i̼ĺ0.16%c343MPaȼe343MPa16Mn䓵ĺϽ^ǰһ㲻A16Mn䓵ĴӲAȡ
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16mnA䓵ĈИ˜ʼҎʲô?2012-08-20
16mnA䓈И˜ʣ|Ҏ|ҎQ345B8-48016Mn16-150Q345B8-480
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40crA䓵ԒǷ׃2012-08-03
40crAԭҪMбҪĸߜػ˻gٽY˻,ȻMȱҪĝWɷҪ̼i懵mğ̎ԫ@һgԺĥ@Nmڸlȡ
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45#c27simnϽYAʹ^кβͬ2012-08-02
45#Ǻ̿0.45%̼ؽY,ַQ45̼Y,ڸ̼,ȸ,gԲ.45#DzҎ,GB˜45,wك|̼ؽY,ӲȲӹ,ģгÁģ,,,횟̎.45#䓏VڙCе,
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䓲ĵҎͲ|Щ2012-08-01
1ģPlPA߾վҎ6.5mm8mm10mm12mmYԴһЩ|Q235|ĺxQȵСֵĵһĸ2䓽ݼy䓣ݼyHRB33520MinSiݼy
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q235A䓱VЩط2012-07-28
q235AʲôõҪЩطPq235A䓵;ý̽Y䓽S߉ݔF܇v偠tҲҪ̫ߡ
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35̖ҪÁʲô2012-07-26
35̖c35#AʲôͬDzͬһNA35̖䓃|̼ؽYõԺmďˇ^пB{|Bʹ35̖䓏VN呼͟ቺ呡
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fڈA䓹IоʲôҪ2012-07-25
fFIоҪf䓵ĺϽԪ䓵ďǸߜ؏ȺgAҺҺBеĿg߀䓵ĥ͟ԺͺԵfһNõγ̼
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ضߵ100ȕr̼䓵LȕӶ2012-07-24
L100ĈA20ȕr100.000ضߵ100ȕrǶLԓ҂̼䓁eӣ̼䓵ľÛϵa=(10.6~12.2)*10^(-6)Ӌ㹫ʽa=(L')/(L1*(t2-t1))딵ֵL'=12.2*10^(-
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ݼyһݼyʲô߀͈Aÿ2012-07-19
̖ͬAcݼyÿǷͬݼyڈA䓻AߵҎߵֱͬA3%Ҳ䓵ÿ7850Kgmmλ7.85*10^(-6)
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38CrMoAl42CrMo̖ĈAʲô^e2012-07-18
38CrMoAl42CrMo̖IJʲô^e38CrMoAlnjõ,һHҪ߶ĥ̎,ͨıӲ920HV,A̎{|(ͨ{|ӲҪ260HB,262~302HB)38CrMoAlٶ^
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女人的超长巨茎人妖在线视频