搜索 - 科创

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气压开伞月初就搞好了，只是没上箭试验，所以没贴出来，上箭试验后再贴。2楼提出的覆蜡的方法应该是可靠的。回头试一下。[s:223]

对于资金相对紧张的爱好者而言，在研制一型发动机之初就想到上箭，可以节省人力物力财力的投入，而不是地面研究了一型发动机后，上箭还得重新研制。

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