搜索 - 科创

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先回复管理员：正因为气压小，所以借助吸气机，气球在火箭内部，可视为刚性（最后火箭壳体会整个限制住气球），这样通过吸气机，气球内部的气压高于高空大气压6L的方案可以加载在我的方案上，只需要将棉布覆盖在...

已经送交厂家打样。用的1.6mm板子，2OZ的加厚铜箔。版费是100元，一共10张板子，均摊是10元/张；工费：7元/张；版权费：1元/张；本人订货取货车费、包装材料费、让人发货请客费等一共20元，均...

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