With the fat tire, the chain had to shift too far outside of the normal bottom bracket to rear wheel alignment, in order to clear the tire width .
随着脂肪轮胎，链条不得不把太多远远超出正常的中轴路向后轮，以清除轮胎宽度。
By combining with some project example, the bridge navigable clear width are calculated and analyzed. In addition, several advices are put forward for implementing current navigation standard.
结合某工程实例分析计算桥梁的通航净宽，并对执行现行通航标准提出几点建议。
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