... standing water on your basement or garage floor is a good indication that the floor drain is in need of cleaning. ... Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid; 4) Standard/ specification: OEM ... fabricating; 5) Inspection, Three lines of inspections before packing. Coating thickness tester, Roughness tester, Go /Ungo Gauge, Sault spray ...