低成本，低断面设计。
运用轮胎整体结构设计法，开发研制出80、75系列低断面无内胎全钢丝子午线载重轮胎。
The 80, 75 series low contour, inner tube free, radial ply truck tires have been developed through utilizing tire integral construction design.
叙述了低路堤高速公路纵断面优化设计数学模型，采用面向对象的编程思想编制的算法实现程序。
The optimized mathematic model for the light fill expressway realizes the program using objects algorithm, which has proved to be effective in engineering practice.
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