供货商可以视情形向第三方订立二线合同，采购所需产品包括材料和成品。该合同可由原供货商或二线供应商订立。怪，这个合同不是由原供应商和二线供应商共同签订的吗？

The Supplier may procure the parts (materials and items) required for execution of the supply as he sees fit by means of sub-orders placed by himself with third parties or by the third parties.

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