Profile: Zhengzhou Zhongding Heavy Duty Machine Manufacturing Co., Ltd. is a manufacturer of crushing equipment. We are an ISO 9001:2000 certified company. Rotary dryer is suitable to dry metallic & non-metallic mineral, clay in cement industry, and coal in coal mines. Jaw crusher is widely used as primary and secondary crushing equipment to crush material with compression strength of less than 320 MPa. It is widely used in mines, metallurgic and chemical industries. Vibrating feeder is also called vibrating feeding machine. It primarily consists of a pair of vibration motors with identical property parameters as excitation source.