Based on the analysis and the characteristics of timbertransportation, the mixed transportation model was built with nonstop and secondary transportation.
在分析木材运输过程的基础上，结合木材运输的特点，建立了木材直达、中转混合运输问题的数学模型。
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Stone co., Ltd. Shanghai Shi God is a mining and timber processing, special-shaped sculpture, production, design, construction and transportation in one of its largest stone companies.