Wherever corrosion may well current an issue (such as on metal) the portion needs to be previously plated with not less than 0.0002” of Electroless Nickel plate. Commonly gun elements can be plated directly and not using a base primer of nickel. Deze blauwe regenlaars voor kinderen houdt je voeten https://caswellengineering35677.blogvivi.com/38311380/cibse-approved-cpd-an-overview