Pham Ngoc Thang, Bui Thi Kim Thoa. ERROR REDUCTION IN MEASUREMENT DEVICE OF SUBTRACTION OF TWO NON-ELECTRIC QUANTITIES BY STRUCTURE OF TWO TIMES INTERGAL METHOD. jst [Internet]. 2023Mar.31 [cited 2024Jul.27];37:73-8. Available from: http://tapchi.utehy.edu.vn/index.php/jst/article/view/590