1) kilohertz repetition rate
千赫兹重复频率
2) MHz repetition
兆赫兹重复频率
5) khz,kiloherz
千周、千赫兹
6) Helmholtz frequence
赫姆霍兹频率
1.
Tracked with pneumatic stiffness, transfer equation of external pressure to internal and Helmholtz frequence, frequence-shift characteristics for roof structures with idealized closed wall and with wall having opening, and similarity criterion theory for pneumatic stiffness are discussed, the key action of wall flexibility in theoretical study is considered.
以气承刚度理论为主线阐述了内压传播方程及赫姆霍兹频率、四周封闭屋盖结构及墙面开孔屋盖结构的频移特性和气承刚度的相似性模拟准则,考虑了墙体柔度在理论分析中的关键作用。
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