automatic circuit switching
automatic design of circuits
automatic switching of telegraph
automatic switching of telegraph and telephone
AUTOMATIC SWITCHING-OVER
collaborative design of automatic weapon
Design of Automatic Control System
Design of Automatic Liquid Level Controller
Design of automatic map division
Design of Automatic Marking System
dual power supply automatic switching over device
System Design of Automatic Selling Machine
Technology of Voltage Automatic Regulation
A new method of voltage switching
switching over of auxiliary power system
switching over of steam supply
switch---to throw--over switching over