Therefore reasonable conformability of preventive maintenance cycle is necessary demand of scientific equipment maintenance decision.
因此，合理的确定预防维修周期是对设备进行科学维修决策的必然要求。
The procedures of secondary development are demand analysis, coding, test and maintenance.
二次开发的步骤是需求分析、现有 HIS分析、代码编写、测试和维护。
The procedures of secondary development are demand analysis, coding, test and maintenance.
二次开发的步骤是需求分析、现有 HIS分析、代码编写、测试和维护。
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