... prices; 3. Perfect survice. About us:Shandong Zhengyu Precision Machinery Co.,Ltd is located in Pingyuan Taoyuan Industrial Area, which is ... base of the machine tool accessories in China. Zhengyu Precision Machinery Co.,Ltd is specialized in designing, manufacturing, marketing of the ... management, Zhengyu Machinery is popular for its high precision and the thoughtful after-service both at home and ...