perf - pin
- perfect capacitor
- perfect circuit
- perfect conductivity
- perfect conductor
- perfect crystal
- perfect dielectric
- perfect diffuser
- perfect diffusing source
- perfect diffusion
- perfect gas
- perfect heat insulation
- perfect lattice
- perfect rectifier
- perfect relay
- perfect restitution
- perfectly inductive
- perfectly screened
- perforate
- perforated cathode
- perforated cover
- perforated paper tape
- perforated receive tape
- perforated tape
- perforated tape exchange
- perforated tape retransmission
- perforated tape transmission
- perforated tape transmitter
- perforating pin
- perforation
- perforator
- perform a cycle
- perform logical operations
- performance
- performance characteristic
- performance characteristics
- performance chart
- performance check
- performance conditions
- performance criterion
- performance data
