这与预计今年年底实施的购买汽车和税收优惠政策相结合，可能导致对未来库存调整的担心。

This, combined with an expected end to the auto purchase tax incentives by the end of this year, is causing concern about a possible future inventory correction.

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但在对自主整车和零部件企业的支持方面，惟独缺少深入到零部件采购环节的税收优惠政策。

But on the whole and the parts enterprises independently, but the lack of support for deep into parts purchasing link tax preferential policies.

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究其原因在于存在三大制约因素，即职工的需求不足、企业的能力和动力不足、国家的税收优惠政策不足。

The reason is that it has three restricting factors, namely insufficient demand of workers, insufficient ability and power of enterprises, insufficient policies of preferential tax.

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