economical application的用法和樣例：
例句
- An economical and practical detector in pentaerythritol production, its principle and application are introduced.
介紹季戊四醇生產中比較經濟實用的一種檢測裝置，對其原理和實際應用加以論述。 - Success in this demanding application in Xinzhu Hi-tech Park established the Yang's reputation.
本司會因客戶需求設計最佳產品組合，使其達到經濟實用的雙重目的。
