因为提高了珍珠棉材料的缓冲性能，所以保证了客户的产品在运输中安全系数。
Because the buffering performance of the pearl cotton material is improved, the safety factor of products of customers in transportation is ensured.
并通过分析发现生产成本、运输成本、集聚效应以及异质产品之间的替代系数是汽车产业集群形成的决定因素。
Studies reveal that manufacturing cost, transportation cost, accumulative effect and heterogeneous product are determining factors for automobile industrial cluster.
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