In the classical vehicle routing problem, it considers the goods weight constraint only, but ignores other loading constraints, such as the loading space constraint.
传统的车辆路径问题只考虑物品装载的质量属性约束，而忽略其他装载属性约束。
Many developers find constraint violations to be a difficult type of class loading problem to resolve.
许多开发人员发现约束违反是一种很难解决的类装入问题。
Furthermore, the constraint condition, sand property and loading velocity all affect the pipeline stability to a certain degree.
管道的约束条件、砂床特性和加载速度对管道稳定性均有影响。
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