最后着重从经济性的角度分析了PON的器件技术并对网络升级策略进行了讨论。
At last, device technologies of a PON are analyzed on the emphasis of economy and network upgrading strategy is presented.
本文以机械设备为研究对象，从经济性角度对设备预防维修工作进行了可行性分析。
In view of machines and equipment, the feasibility of preventive maintenance is analyzed in the economic aspect in this article.
从经济性考虑，循环水系统的冷换设备应优先选用碳钢或碳钢涂覆TH910漆材料。
The carbon steel or carbon steel coated with TH910 paint should be first selected for the cooling equipment in the circulating water system if economics is to be considered.
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