大多数车企在面对供应链时，扮演的是组装商的角色。博世的雷达、大陆的刹车、安道拓的座椅，每一级供应商都要在零件上切走一块利润。当这些零件最终汇集到整车工厂时，成本的底线已经被抬高了。
Send abandoned carts, out-of-stock, restock, preorder, order status, and shipment notifications to contacts
，这一点在同城约会中也有详细论述
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