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- line displacement
- line distortion
- Line Drawing
- line drift
- line driver
- line element
- line element field
- line-ellipse intersection
- Line Embroidery of Lotus and Mandarin Duck Book
- line emission
- line emission cloud
- line emission nebula
- line entity
- line equation
- line feed
- line flyback pulse
- line formation
- line frequency
- line geometry
- line graph
- line grating
- line group
- line identification
- Line Identifications of the Radio Astronomy Spectrum
- line image sensor