active electronic countermeasure造句

The SM-73 was designed to carry radar reflectors and active electronic countermeasures operating in S-band, L-band, and lower frequencies.
The AN / SLQ-32 countermeasures set provided " Fletcher " with additional defense against anti-ship missiles through the use of active electronic countermeasures.
Flight II of the " Arleigh Burke " class, introduced in 1992, incorporated improvements to the SPY radar, and to the Standard missile, active electronic countermeasures, and communications.
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