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KW-50G E7016-G DA5016W DA5016W Low hydrogen type Welding of 490N/П class high tensile strength weather-proof steels for vehicles, building and bridges. bookbook KW-50V E7016-G DA5016G DA5016G Low hydrogen type Vertical-down welding of 490N/П class high tensile strength weather-proof steels for vehicles, building and bridges. bookbook KW-60G E8016-G DA5816W DA5816W Low hydrogen type Welding of 590N/П class high tensile strength weather-proof steel for vehicles, bridges and other steel structures. bookbook KW-50WH - DA5026W DA5026W Low hydrogen, iron powder type Flat and horizontal fillet welding of 490N/П class high tensile strength weather-proof steel for buildings, bridges and other steel structures. bookbook