TEJARAT GOSTAR SHAYAN SAZEH ejarat gostar engineering with brand of shayan sazeh , having more than 10 years of experience in the field of design and manufacturing of heavy and lightweight steel structures and industrial sheds (silos), was licensed by golestan province organization of industry mine and trade Currently , shayan sazeh co. has an area about 13000 m2 and annual production capacity of 3500 which is located in Aq QAala industrial state.