direct cross-connection
direct cross-connection
- passive immunity
- passive immunization
- passive immuno-gene therapy
- passive immunotherapy
- passive income
- passive income generator
- passive income generators
- passive incomes
- passive incontinence
- passive information gathering
- passive infrared
- passive infra-red airborne tracking equipment
- passive infrared and microwave intruder detector
- passive infrared application-specific integrated circuit
- passive infrared detector
- passive infrared guidance system
- passive infrared intrusion detector
- passive infrared motion detector
- passive infrared sensor
- passive infrared situation awareness
- passive injectable transponders
- passive input panel system
- passive in-situ chemical extraction sampler
- passive insufficiency
- passive integrated transponder