surreptitious listening device

surreptitious listening

listening device

wall listening device

passive listening device

surreptitious movement

surreptitious chemical weapons capability

surreptitious eavesdropping

surreptitious entry

surreptitious method

surreptitious operation

surreptitious smoking

surreptitious testing

listening post

listening silence

listening surveiilance

check for listening devices

underwater listening post

gaining information by use of listening posts

wall listening microphone

radio listening service

passive listening

air listening post

safety and arming device / safety-and-arming device

air intake device / air-intake device

airborne surveillance device

ambush detection device

anti-countermining device

anti-fuse-removal device

anti-recovery device

anti-sweep device

anti-withdrawal device

automatic switching device