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used an RD-0233 / RD-0234 engine complex, while the second stage used an RD-0235. The third stage was a Briz-KM ( meaning Breeze-KM), which has a mass of about 6 tonnes when fuelled, and is capable of flying for 7 hours and reigniting its engine six times during flight, allowing different satellites to be placed into different orbits. All stages used unsymmetrical dimethylhydrazine

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