It is a high-tech enterprise that δ☆∑integrates the research↕δ and development,
production, sales, and service of st★₩andard substances/samp↑≈les.
It is a high-tech enterprδ♣"ise that integrates the research ≈§§€and development,production, ✘ £ sales, and service of∏ •λ standard substances/sa♠®÷mples.