The development of Bas 90 started in the 1970s and began being implemented in the 1980s .
The development of Bas 90 began in the 1970s and was implemented in the 1980s .
The development of Bas 90 began in the 1970s and was implemented in the 1980s .
اكتب نسخة معاد صياغتها من الجملة: The development of Bas 90 started in the 1970s and began being implemented in the 1980s . خرج: