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For the inner cocoon, we precisely determined the ratio of jet power to ambient density $L_{\\rm j}/n_{\\rm a}$ to be $(0.3-0.7)\\times 10^{43}\\,{\\rm erg}\\,{\\rm s}^{-1}\\,{\\rm cm}^3$. Similarly, for the outer cocoon, we found that this value is more than an order of magnitude larger at $(0.9-3.7)\\times 10^{44}\\,{\\rm erg}\\,{\\rm s}^{-1}\\,{\\rm cm}^3$. 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