pipe and metal joint system assembly 1,Direct manufacturer 2,competitive price 3,One-stop ... sales 4,The best quality Pipe and metal joint system assembly line ModelJY-4MaterialCold roll steelProcessCold roll steel sheet->Cut ... INDUSTRIAL PARK,NO.65 DONGFANG ROAD,SONGGANG AVENUE,BAO'AN DISTRICT,SHENZHEN, GUANGDONG, CHINA