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上蜂园 发表于 2016-10-24 10:38 5 A, {2 u/ C Y4 R) q" s1 {跷跷板方案也行不通,当里面有蜂在上面时,外面的蜂就不能进来,活门就变死门了
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上蜂园 发表于 2016-10-24 10:173 n$ l% }) Q; G+ t' _ 很难# k5 U) X& j0 k0 ] 一、材料问题:踏板为弹性塑料片要做到,一只蜜蜂一蜡娥的重(还有风压,雨滴,水的吸力等)就能开关 ...
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