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By implementation of the core technology of capacitor-resistance welding, RingMash technology, metallic bonding, is developed to manufacture various components. It is the best suited for powertrain components such as transmission gears at low cost. Components made by RingMash are attributed to smaller and lighter transmission. The technology is recommended to manufacture co-axle male-female work pieces bonding, male side diameter is slightly larger than female side hole. RingMashing is a solid state bonding without melting work pieces. The actual RingMashing process is done in ambient atmosphere and does not use filler. RingMashing process itself takes only 100 milliseconds, results very minimum Heat-Affected Zone (HAZ), normally no more than 1 mm. The minimum HAZ achieves excellent structural integration for better performance of transmission. If two work pieces are same metals, spattering free bonding is possible.