секретний агент; підпільник
agent / agent network / agents
CW agent (chemical warfare agent)
obscurant agent (vision-restricting agent)
damage agent / damaging agent
clandestine
clandestine operation; covert operation
clandestine border crossing
clandestine operation
clandestine organization
experience with clandestine work
keeper of a clandestine address
give clandestine assistance
clandestine agencies
clandestine assembly area
clandestine force
clandestine operations
clandestine passive resistance
clandestine patrol base
clandestine reconnaissance
clandestine warfare
agent vapor
anti-plant agent
automatic chemical agent alarm
biological agent
blister agent/ gas
blood agent
chemical agent detector
chemical agent detector kit
chemical agent detector paper
chemical agent dissemination
chemical warfare agent
choking agent / gas