سال 1380 عضو یک گروه کوهنوردی شدم و آخر هفتهها در برنامههایشان شرکت میکردم… دربند، گلابدره، درکه، کلکچال، پیاز چال، …
The owner of the photo above is best known For “Determining why the Liberty Ships were breaking in half during …
Many engineers regard materials selection as simply the selection of a material of construction of new facilities, plant additions, or …
