动态保护
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Dynamic conservation management 动态典藏管理
Dynamic Conservation and Control 动态保护控制
soil and water conservation dynamic 水土保持动态
·2,447,543篇论文数据，部分数据来源于NoteExpress
Taking the henhouse as semi-obturation system, dynamic conservation of NH3 in henhouse under ventilation condition was analyzed based on the law of conservation of mass.
利用物质守恒原理，以鸡舍为半封闭系统，分析了鸡舍内NH3在通风状态下的动态守恒情况。
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