doub - dyna
- double
- double beam
- double channel
- double click
- double connection
- double crossed-loop aerial
- double crucible process
- double dash
- double density
- double diode
- double dipole
- double frequency-changing
- double heterostructure
- double image
- double letter
- double letter width
- double limiter
- double line-spacing
- double modulation
- double phantom circuit
- double precision
- double rule
- double sideband
- double strike
- double width
- double-beam CRT
- double-beam display
- double-beam oscilloscope
- double-beam radar
- double-break contact
- double-break jack
- double-break switch
- double-bridge diplexer
- double-bridge two-way repeater
- double-channel cathode-ray direction finder
- double-check
- double-coil relay
- double-cone aerial
- double-cone antenna
- double-current
