On August 30, 2003, the China Machine Tool Association Superhard Materials Branch held a second executive director meeting

Abstract The 4th Zhengzhou International Superhard Materials and Products Seminar was held in Zhengzhou Hotel from August 29th to September 2nd, 2003.

The 4th Zhengzhou International Superhard Materials and Products Seminar was held in Zhengzhou Hotel from August 29th to September 2nd, 2003.

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