... Surface: Annealing, pickling, sand-blasting Production procedure: Raw elements(C, Fe, Ni, Mn, Cr, Cu etc., )--smelted into ... into acid liquid--cutting into pieces--checking quality--package Application: Machine manufacture, vehicles, ships, construction, chemical industry, household appliances ... width and thickness, we usually add "a", "b", "c" to the Height to distinguish. The channel's specification ...