maintenance cost of unit product 单位产品维修费
maintenance cost of unit
机组维护费用
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The idea of design for this unit is worth learning and using for reference by all designers, for example, integrative design, less maintenance time, lower running cost and continuous optimized design.
机组设计中采用的整体化设计、少维护时间和低运行费用等设计理念，不断优化的设计值得借鉴。
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