with provision for protection against corrosion, e.g. due to gaseous acid (; inhibiting corrosion of metallic material or incrustation in general C23F)

Full Title

Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge (pressurised apparatus for purposes other than storage, see the relevant subclasses such as A62C, B05B; associated with vehicles, see the appropriate subclass of classes B60 - B64; pressure vessels in general F16J12/00 ) > with provision for protection against corrosion, e.g. due to gaseous acid (; inhibiting corrosion of metallic material or incrustation in general C23F)