~(87)Rb atomic frequency standard
atomic frequency standard
hydrogen maser frequency standard
primary frequency standard
quantum frequency standard
rubidium atomic frequency standard
rubidium frequency standard
standard standard of vo|
Frequency tuning
频率调谐
频率党
频率修调
频率调节
调频
变频
光栅选支
调谐
frequency tuning thickness
spatial frequency tuning
temporal frequency tuning
temporal frequency tuning curve
tuning frequency filtering
95th standard project standard