搜索 - 科创

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压心和重心测了，重心略高一点；发动机用PVC管做的，装药15克，箭体绝对牢固；我是在浙大的校园里发射的[s:274]，我后边就是操场，隔着一堵墙，可惜门关着进不去，就只好在操场外发射了；旁边看过了，测...

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