按钮式高速脉冲拨号电子电话的呼叫系统
push button high-speed pulse dialling calling system for electronic telephone
X射线脉冲星自主导航系统
X-ray source-based navigation for autonomous position determination program(XNAV
Volterra型脉冲积分－微分方程
impulsive Volterra-type integro-differential equat
U100plus双频双脉冲激光
UIO0plus laser lithotripsy