J41Y-2.5R,J41Y-4.0R,J41Y-6.4R,J41Y-10.0R,J41Y-16.0R,J41Y-16I,J41Y-25I,法兰 J41Y-2.5R,J41Y-4.0R,J41Y-6.4R,J41Y-10.0R,J41Y-16.0 无锡市昌林自动化科技有限公司