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1、Binzhou Zhengdao Mechanical Manufacturing Co., Ltd.（a.k.a. BZD) was founded in 2006. It is conveniently located in the City of Binzhou in Shandong Province, China, surrounded by a robust transportation and service network.

2、Main products: wear-resisting piston ring carrier inserts, salt cores, and ring carrier inserts with cooling passages.

3、Founder and President, Mr. Su Daosheng, is a researcher who pioneered the field of wear-resistant piston ring carriers in China. He developed the country's first wear-resisting piston ring carrier insert in 1984. Today, his company leads the piston ring carrier inserts and salt core markets in both quality and technology.

4、BZD has passed the following authentications...