Find out all of the information about the Tabor Electronics product: signal generator LS1291D. Contact a supplier or the parent company directly to get a quote or to find out a price or your closest point of sale.
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答案解:1)Pr=0.7Re=dup/ p=dqm/=0.02 x 8000/3600/(300x 0.785 x 0.022 x 1.9 8 X10-5)=2.38X 104> 104( 湍流)l/d=2/0.02=100>60,空气被加热 n=0.4以 1 =0.023 l/dRe0.8Pr0.4=0.023 X 0.0285/0.02 X (2.38 X 104) X0.70.4=90.12w/m2k2) 以外表面为基准K2=1...
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