/images/1041385860215607387/1285611666326945822/trung-sinh-2011-dai-hoc-hang-hai-kiem-lau-985-chuong-381-tinh-dat-tri-gia-tong-bo-ban-giao-san-pham-moi-nghien-cuu-phat-minh.txt?ex=66eae6aa&is=66e9952a&hm=3ff76f12cfd30ce00352345cdf0f09223f0d6de1cb8792f0c6b0de5ece66247a&