2) blade passing frequency
叶片通过频率
1.
By means of time-frequency analysis,the time-frequency structures centered on 550 Hz and 2 200 Hz were identified;the blade passing frequency of the first 3 compressor rotors,and some of their sum-frequency and difference frequency signals,were identified too.
通过时频分析,从压力信号中辨识出了以550 Hz和2200 Hz为中心的时频结构;辨识出了压气机前3级转子叶片通过频率信号及它们的一些和频、差频信号。
3) runner passing frequency
转轮通过频率
4) transmission-type frequency meter
通过式频率计
5) passing frequency of rolling bearing
滚动轴承通过频率
6) feed-through style RF power-measuring method
通过式射频功率测量法
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条