... bub Japan 1. Japan standard 2. A B C Single Double type 3. 45 steel \ A3 Q235 A-typeA-type sprockets (plate wheel) have stock ... conditions as water, steam or chemical corrosive conditions as acid and alkaline.SUS 25B, SUS35B, SUS40B, SUS60B, SUS80B.Double pitchWe ... 2060B, 2062B, 2080B, 2082B, SUS2040B, SUS2042B, SUS2050B, SUS2052B, SUS2060B, SUS2062B. A B C singgle double Sprocket welding in Japan