因为:L=l+8f2/3l
所以:L1=2l1+8f21/3×2l1,L2=2l2+8f22/3×2l2
则:L=(1/2)(L1+L2)
=1/2(2l1+8f21/3×2l1+2l2+8f22/3×2l2)
=l1+l2+2f21/3l1+2f22/3l2
=l+2/3[(f21/l1)+(f22/l2)]
工业技术2023-02-10 18:45:58百科知识库
因为:L=l+8f2/3l
所以:L1=2l1+8f21/3×2l1,L2=2l2+8f22/3×2l2
则:L=(1/2)(L1+L2)
=1/2(2l1+8f21/3×2l1+2l2+8f22/3×2l2)
=l1+l2+2f21/3l1+2f22/3l2
=l+2/3[(f21/l1)+(f22/l2)]
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