It is a high-tech enterprise that ®←₹☆integrates the research and de₹≤'velopment,
production, sales, and service of st≥↕×andard substances/samples.
It is a high-tech enterpr↑>ise that integrates the research ♥δand development,production, saΩ•les, and service of stan€♣×$dard substances/sample§♦∏s.