... air change rate 通风换气次数 ; 换气率 ; 空气更新率 ; 换气次数 material change rate 材料变换率 instantaneous speed change rate 瞬时调速率 ...
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material time rate of change 材料的时间变化率
·2,447,543篇论文数据，部分数据来源于NoteExpress
The results show that the axis linear ablation rate of the material has a great change and the linear ablation increases along the gas flux direction.
结果表明：导流管轴向线烧蚀率变化较大，沿气流方向呈上升趋势。
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