区域振兴 Area Rejuvenation
区域间振荡模式 Inter-area Modes ; inter-area oscillation mode
特征官能团的振动区域 Characteristic Group Vibrations
区域核磁共振 MRI
共振区域 Resonance region
当激振频率较小时，内部区域土体材料阻尼对土体扭转阻抗的刚度部分基本没有影响。
When the excitation frequency is relatively low, the material damping of inner region has negligible influence on the real stiffness of the soil.
针对低、高压轴流送风机及多级轴流压缩机在低流量区域的失速喘振特性及其预防措施进行了分析。
The stall surging characteristic and its prevention measure are analysed with focus on low-pressure axial fan, high-pressure axial fan and mutiple-stage axial compressor.
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