Dacheng Feilong keel Hardware Factory is located in Beijing, Tianjin , the Bohai Economic Circle in the heart , is a professional production and sales of PVC curtain stainless steel suspension system of the enterprise, founded in 1991 , a total investment of 20 million yuan , covers an area of ??20,000 square meters. The company now has the worlds leading production line 36 , advanced equipment , scientific formula , skilled .