23 quad造句

• Within a few years, Nancy Evans and a few colleagues were able to start a small project with funding from NASA . They managed to find four rare Ampex FR-900 tape drives highly specialized drives that had only been used by government agencies such as the FAA, USAF, and NASA . ( The FR-900's 23 Quadruplex videotape format, only in the FR-900's case, the drive was designed to record a wideband analog signal of any type for instrumentation or other purposes, rather than specifically a video signal as in 23 Quad's case . ) Over time, Evans'team also collected documentation and spare parts for the tape drives from various government surplus sources.