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HINO Spiral Bevel Crown Wheel & Pinion Gear Nonstandard High Precision 0.5 Module 1. material carbon steel SAE1020, SAE1045, Cr12, 40Cr, Y15Pb, 1214Letc Alloy Steel 20CrMnTi, 16MnCr5, 20CrMnMo, 41CrMo...