... 30X25mm5.Certification:ISO9001,ISO140016.Annual capacity:3,500,000 kits Anhui Dowei Solar Technology Co., Ltd is one of subsidiary ... companies of Anhui Dongwei Group Industrial Co., Ltd (short for Dongwei Group). ... It is the largest manufacturer of aluminium extrusion profiles in Anhui Province. Dongwei Group possesses 18 extrusion lines, 5 powder ...