The analysis results show that the scheme of one way straight sill is an optimized scheme which is helpful in lightening of the structure of the long and big cargo wagon.
分析结果表明：单向直梁方案是一种优化方案，有助于大车结构的轻量化。
The analysis results show that the scheme of one way straight sill is an optimized scheme which is helpful in lightening of the structure of the long and big cargo wagon.
分析结果表明：单向直梁方案是一种优化方案，有助于大车结构的轻量化。
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