1. Driving cylindrical gear for MCY axles 2. Material:20CrMnTi 3. Figure number AZ9970320118 ... in the city, such as Shandong Taifeng Steel Industry Co., Ltd., Shandong Wanguan Spinning Products Co., Ltd., Shandong Luyan Color Masterbatch Co., Ltd. Realleader Fitness International Co., Ltd., Taian ... abroad to create a splendid future together.: 20CrMnTi Driving Cylindrical Gear