ag4dDownload scientific diagram | shows Ag4d XPS spectra measured in H 2 , N 2 , O 2 , and He. It is seen that each gas results in a different fine structure in the inelastic scattering backgroundWelcome to 4D Ag Fashion. Enjoy shopping for calf jackets, milkers clothing, sleeves, bibbed overalls, pouches and MORE in our webshop and check out our page for special