... ordinary steel;2.Corrosion-resistant:it stainless, no mold, no rot, no paint, the ability of many gas, ... some flexibility, which makes the people who work in the above long-term comfort, as a work ... , and can be used two decades, and no maintenance, thus The overall economic efficiency is much ... and have a spark, especially for use in explosive environments, in addition, the covers with non-slip surface ...