The stepper ball screw nut has been used in a beammonitor system of Beijing proton synchrotron.
本文阐述的步进滚珠丝杠副已应用于北京质子加速器的束流测量系统中。
2
B. External fetal monitoring. The FHR is measured by focusing an ultrasound beam on the fetal heart. The fetal monitor interprets Doppler signals.
外监护。通过集中超声波束于胎儿心脏来描记胎心率，胎儿监护翻译多普勒信号。
3
These devices are most effectively used in nulling and beam centering applications where the goal is to maintain or monitor optical alignment by keeping a balanced or null signal.