Top 10 enterprises of self drilling screws in China.

Handan Shuangzi Metal Products Co., Ltd bụ ọkachamara emeputa nke mkpọpu ala ịghasa na ịme ọpịpị ịghasa ụlọ ọrụ. Ebe ọ bụ na ya oruru, ụlọ ọrụ a na-elekwasị anya na mmepụta na R & D nke mkpọpu ala ịghasa, nke emeworo a oge a, ụkpụrụ dị elu, ọnụ ọgụgụ, dịgasị iche iche nke ọkachamara mmepụta akara nke malite ịgba ọdụ ịghasa. All eji ngwá na-imported si Germany, Japan na Taiwan, na kwa afọ mmepụta nke elu àgwà, multi-dịgasị iche iche malite ịgba ọdụ ịghasa .Onye n'ọrụ n'elu anụ ụlọ technologist, na hegzagon-shaping, clipping, eri-Rolling, carburize, zinc plated, washer igwe, ngwugwu na ndị ọzọ na Filiks, ọ bụla njikọ agbalịsi izu okè na kasị mma.