在适当的维护条件下，信号电源模块及轨道电路产品的使用寿命为15年，我司终身提供设备维护及维修所需的元器件。质保期后，我司提供长期的技术支持并以优惠的价格提供备品备件（具体费用详见报价表）。在备件将要停产的情况下，事先将要停止生产的计划以电话和书面的形式通知买方以便买方有足够的时间采购所需的备件。在备件已经停止生产以后，如买方要求，将免费为买方提供备件的图纸和规格。

   Under the proper maintenance conditions, the service life of the signal power supply module and the track circuit is up to 15 years. We provide the components required for the maintenance and repair of the equipment for life. After the expiration of warranty period, we provide long-term technical support and provide spare parts at the favorable price (see the quotation form for details). In the event that spare parts are to be discontinued, we will notify users the plan to discontinue production in advance by telephone and in writing so that users have sufficient time to procurethe required spare parts. After the spare parts have been discontinued, users will be provided with drawings and specifications of the spare part free of charge uponthe request of users.