提供计划内相关信息以确保零部件采购时间段的准确性，既要保证项目到期前完成，同时在服务中心维持适当的存货量。
Provide planning information to ensure spare parts are ordered in at correct timeframe to meet project deadlines whilst maintaining appropriate inventory levels within Service Centre.
服务费是预缴的，预缴金额是一年有效期，过期金额便会扣除，到期前增值，剩馀金额可保留。
Service fee is paid in advance, the advance payment is valid for one year, the amount overdue will be deducted prior to maturity value, the remaining amount can be.
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