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To provide automatic longitudinal feed 0.07 and 0.014. With gears changed, also practicable the following thread cutting. # 3511 MM: 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1.0, 1.25, 1.5, 1.75, 2.0, 2.5, 3.0. INCHES: 10, 11, 12, 14, 16, 8, 20, 22, 24, 28, 32, 36, 40, 48.
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