AFS-640

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AFS-640 ( afs-640 )

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9/27/01 transceivera unit serving as both a receiver and a transmitter. transformera device for raising or lowering AC voltage. transmitteran electronic system designed to produce modulated RF carrier waves to be radiated by an antenna; also, an electric device used to col­ lect quantitative information at one point and send it to a remote indicator electrically. transponderan airborne receiver-transmitter de­ signed to aid air traffic control personnel in tracking aircraft during flight. unbonding—adhesive or cohesive failure between laminates. Compare definitions of adhesive, cohe­ sive debond, and disbond. very high frequency (VHF)a frequency between 30 and 300 MHz VHF omnirange (VOR)an electronic air naviga­ tion system that provides accurate direction infor­ mation in relation to a certain ground station. videoscope—a type of borescope. visible light—electromagnetic radiation that has a wavelength in the range from about 3,900 to 7,700 angstroms and that may be seen by the unaided human eye. visual checkutilizing acceptable methods, tech­ niques, and practices to determine physical condi­ tion and safety item. voltunit of potential, potential difference, or elec­ trical pressure. voltage regulatordevice used in connection with generators to keep the voltage constant as load or speed is changed. warpthreads in a fabric that run the length of the woven material as it comes from the mill. wattthe unit of power; equal to a joule per sec­ ond. wattmeteran instrument for measuring electrical power. waveguidea hollow, typically rectangular, metal­ lic tube designed to carry electromagnetic energy at extremely high frequencies. AC 43.13-1B CHG 1 Appendix 1 wavy-grained wood—wood in which the fibers collectively take the form of waves or undulations. welding—a materials-joining process used in mak­ ing welds. welding rod—a form of welding filler metal, nor­ mally packaged in straight lengths. welding torch—the device used in gas welding. wood decay—disintegration of wood substance through the action of wood-destroying fungi. wood decay - incipient—the early stage of decay in which the disintegration has not proceeded far enough to soften or otherwise perceptibly impair the hardness of the wood. wood decay - typical or advanced—the stage of decay in which the disintegration is readily recog­ nized because the wood has become punky, soft and spongy, stringy, pitted, or crumbly. x-ray—a radiographic test method used to detect internal defects in a weld. XL-ETFEA process of radiation cross-linking the polymer chains is used to thermally set the plastic. This prevents the material from softening and melt­ ing at elevated temperature. XL-Polyalkenean insulation material based on the polyolefin family that has its normally thermomelt characteristic altered by the radiation cross-linking process to that of a nonmelt, therm-set material. 9

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