annual operation cost
年运营成本
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In this paper, the way of providing cold energy and the existing Problem were discussed, the specification and annual operation cost of the single-action on liBr-Refrigeratory were thoroughly studied.
分析了燕化化工一厂目前的供冷方式及存在的问题，对单效型溴冷机的技术参数、年运行费用等进行了全面的分析比较。
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