As an emerging branch of logistics, Reverse logistics has injected new vitality to the subject, and also attracted many domestic experts and scholars to study.
The formula to calculate the diameter of branch pipes and ellipse girth was given when the diameter of main pipe is known or reverse to resolve, discussed calculation accuracy.
给出了由已知主管相贯线处直径确定分支管直径和椭圆周长或反向求解的计算公式，讨论了精度。
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Objective To present application of a reverse fascial flap from neighboring digital with the dorsal branch of the proper digital nerve for repair thumb tip defect.