已经超出三包有效期限和免费维修期限或者无法证明在保修期内的产品；
The warranty period or free maintenance period has expired or no evidence shows that the product is still in the warranty period;
必须在保修和保养手册中提供的印签位置盖上印签作为对系统检查的证明。
The system check must be certified in the stamp spaces provided in the guarantee and maintenance booklet.
如果买方出具书面的不良品证明，卖方会提供上文承诺的保修服务。
The foregoing warranty is given provided buyer gives written notice of any defect.
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