active electronic countermeasure的用法和样例：
- active electronic countermeasures
- DRFM has developed an essential part of the electronic countermeasure (ECM) systems.
- active electronic radar countermeasure
- The simulator, which is functioned for training of electronic countermeasure, can hold a suppositional war field for the training of anti-air gun fire control radar.
- The development of ship Electronic Countermeasure (ECM) technologies has made the conventional single-mode guided antiship missiles less effective.