string(3) "DDD" NULL string(3) "AAA" string(3) "CCC" string(4) "user" NULL NULL string(3) "CCC" string(4) "user" NULL
| صفحات: | 93 صفحات |
| ناشر: | Helwan University |
| نویسنده: | HYDRO POWER PLANT TECHNOLOGY Helwan University Faculty of Engineering Mechanical Power Department Dr. Mohamed A. El-Monem A. El-Aziz Nawar |
| registration_number: | مکانیک 15000 تا 19999 |