???翻譯

(經(jīng)濟(jì)性)
[??] 經(jīng)濟(jì)性 jīngjìxìng.
　　■ ??? ??? ???, ???, ???? ??? ??? ??; 鍋爐運(yùn)行的穩(wěn)定性, 安全性, 經(jīng)濟(jì)性無法保證