... powder metallurgy 粉末冶金 powder rocket engine 火药火箭发动机 powder rolling 粉末轧制 ...
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After re-developed to improve the formula after the powder has fully met the performance requirements and system requirements of high-performance rocket engine.
经过重新改进配方研制后，火药的性能完全满足了系统的要求及火箭发动机高性能的要求。
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