string(3) "DDD" NULL string(3) "AAA" string(3) "CCC" string(4) "user" NULL NULL string(3) "CCC" string(4) "user" NULL
| صفحات: | 10 صفحات |
| ناشر: | International Journal of Advances in Scientific Research and Engineering (ijasre) |
| registration_number: | مکانیک 15000 تا 19999 |