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MIL-T-48558 Revision B, May 29, 1990
Complete Document
Superseded By: MIL-DTL-48558
TELESCOPE, ELBOW: M138
Additional Comments: RENUMBERED AS MIL-DTL-48558
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The Telescope Elbow M138, when mounted on Telescope Mount and Quadrant M172, is primarily intended to lay the M198 Howitzer in azimuth and elevation for direct fire.