搜索 - 科创

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您除了逆变就是电鱼。。。。。。。。。。。不过话说你的渔机有下水机会不。。。。。。所以还是发明新的逆变电路方便大家吧。。。

做一个钢质“注射器”用手摇的螺杆（长螺栓）推动小的活塞（用胶圈密封，同发动机两端）进行水压试验是否靠谱？

谢谢你的嘲笑，这不是广告，空间有图，看中了联系我我会用我电话发图片的。我不会发图不是你们嘲笑的理由。

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