1·And has compact structure, the expansion of portfolio of simple, long life, less maintenance expenditure and so on.
并具有结构紧凑，扩展组合简捷，使用寿命长，维护开支少等特性。
2·To evaluate feasibility of a waterway project, the most important index is EIRR, which is calculated based on the economic benefit, investment and maintenance expenditure.
评价航道工程在经济上是否可行，最重要的一个评价指标就是经济内部收益率。
3·Applying reliable theories, the decision-making model of optimum maintenance period for fully mechanized face equipment has been developed based on the rule of minimum running expenditure.
应用可靠性理论，得出了基于运行费用最小原则的综机设备最佳维修周期的决策模型。
4·The maintenance of equipment is one of an important expenditure in industrial production.
设备维修成为了工业化生产中一项重要的成本支出。
5·China's defense expenditure falls into the following categories: personnel expenses, costs for maintenance of activities, and costs for equipment.
中国国防费包括：人员生活费、活动维持费、装备费。