Sanitary Manhole Cover(Manhole Cover ,manhole) Standard:ISO, DIN, SMS Sanitary Manhole Cover(Manhole Cover ,manhole)Specification: 450× 350, 530× 430Material quality:AISI 304 or AISI 316L Standard: ISO, DIN, SMSUses in: Drugs manufacture drink dairy product projectSome Details, Please Contact Me! Look at the picture first, and then see the technique parameter in the tableFollow: circular manhole ...