Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: Optics design, geometrical and beam optics, wave optics Optical and microoptical components, diffractive optics, devices and systems
معدن شن و ماسه کارخانه سنگ شکن در هند. سنگ شکن فکی (Jaw Crusher ) این نوع سنگ شکن دو کاربرد اصلی دارد 1 در شروع خط عملیات خرد کردن سنگ های معدنی یا تولید شن و ماسه به منظور خرد کردن سنگ های بزرگ و تهیه خوراک ماشین آلات دیگر 2
International Widows'' Day was introduced to address poverty and injustice faced by widows and their children in many countries. It was officially recognized by the United Nations in 2010 and is observed anually on June 23.
Spring International Language Center Study English in
Spring International Language Center is a professional academic organization that provides English language training and crosscultural eduion As an institution, we strive for excellence in an environment which treats faculty, staff and students with respect.