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When ordering replacement parts or equipment information, the complete identification number should be included. This applies to all components, kits, and chassis. If the component part number is not known, the order should include the number of the chassis or kit of which it is a part, and sufficient description of the desired component to identify it.
Crystal and channel element orders should specify the crystal or channel element type number, crystal and
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carrier frequency, and the model number in which the part is used.
Orders for active filters, Vibrasender and Vibraspondor resonant reeds should specify type number and frequency, should identify the owner/operator of the communications system in which these items are to be used; and should include any serial numbers stamped on the components being replaced.
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