7t

1

However the Chinese began to use it in the 7t century Paper was invented by a Chinese man called Cai Lun almost 2,000 years ago .

然而，中国人在7世纪就开始使用纸币了，而纸张是大约2000年前一个叫蔡伦的中国人发明的。
2

Investigation of enhancing the fatigue life of welding 7T driven rear axle assembly

提高焊接7T驱动后桥总成疲劳寿命方法
3

1 × 10 6 male donor bone marrow MNCs with 1 × 10 7 TK + T lymphocytes and 1 × 10 7T lymphocytes were respectively transplanted into each H 2 haploidentical femal F1 recipient , to observe the ability to induce GVHD .

1×106雄性供鼠骨髓单个核细胞分别与1×107TK+T细胞和1×107T细胞移植半相合雌性Fl受鼠，观察两者诱导GVHD的功能。