解决车辆路径问题，提供了很多有用的算法实现，比如3-opt，2-opt和or-opt等算法，以静态库的形式提供给别人调用。-Solving vehicle routing problem, provide a lot of useful algorithms, such as 3-opt ,2-opt and or-opt algorithm, in the form of a static library available to others call.

Three channel types. Three sizing options. Constant Manning coefficient Excel spread sheet with Visual Basic functions