recovery aid的用法和樣例：
例句
- Water Submetering is a very widely accepted form of utility cost recovery.
分水表是一種廣泛接受的公共事業成本回收設備。 - The continuous induction hardening technology for large-scale plate parts of metal recovery equipment has been investigated.
研究了金屬回收設備上的板狀零件大平面板件的連續感應淬火工藝。 - In view of the status quo of small capacity and low operation level of domestic sulfur recovery units, technicals revamping options suitable for Chinese refineries were proposed.
針對我國煉油廠硫回收裝置規模較小，操作水平偏低的現狀，提出了適于我國國情的技術改造意見。
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