BBD is the first man-made diamond research technology in China, with 29 patent reports, including 9 invention patents and 8 utility model patent...

BBD is the first man-made diamond research technology in China, with 29 patent reports, including 9 invention patents and 8 utility model patent...BBD is the first man-made diamond research technology in China, with 29 patent reports, including 9 invention patents and 8 utility model patents.