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上蜂园 发表于 2016-10-24 10:381 O# }) D9 c: W$ b2 t! I; d 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 10:17+ J: f: H6 J1 F& k5 ]5 ~/ C/ y 很难( G8 b6 I( O! Q9 M3 | w) a* w 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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