minor modification短语⁹⁶⁶⁷⁷⁺⁶ 基本例句 小改装 Adoption of second version of generalized design of small scale urea plant issued by China Wuhuan chemical engineering Corp. in Ninyang fertilizer plant and minor modification on it are introduced. 简述宁阳化肥厂采用中国五环化学工程公司编制的小尿素二版通用设计，并在此基础上进行小改小革的成功经验。 chemyq