It is a high-tech en≤♦γterprise that integrates th$÷₽♠e research and development,
production, sales, and service of±γ standard substances/samples.
It is a high-tech enterpri↑↔∞×se that integrates th≠§↔σe research and developmen§✔λt,production, sales, and service♥• of standard substances/samplφ≥φes.