absorption electronic countermeasure的用法和样例：
- DRFM has developed an essential part of the electronic countermeasure (ECM) systems.
- 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.
- According to main features of electronic countermeasure equipment collocation, this paper brings forth using RS theory to solve the problem.
- A simulation system of effectiveness evaluation for electronic countermeasure (ECM) is investigated under attack-defense environment.