③For products made of stainless steel, heat treatment* and passivation ** solutions are applied. Passivation is a rust-resistance treatment, but it is not effective on the machined surface and not a totally rustproof solution. ＊Heat Treatment Solution Heat treatment by the carbon formed on the surface during blank manufacturing is made to infiltrate the material interior. ＊＊Passivation Immersion of the metal in a nitric acid solution to make it more rust-resistant.
④After attaching the racks to the base, please fasten with dowel pins. Clamping only by mounting screws could possibly cause the screws to be broken, due to the heavy load.