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电磁铁打捞器我队在农田灌溉打井施工中，由于钻井直径大，又未下并口管，稍不注意，则可能发生将小工具掉进井内的事故。如何又快又好的排除这类孔内事故呢？经过发动群众讨论用电磁吸铁器的办法，经多次使用效果很好，现将使用情况介绍如下：电磁铁的制作：我们就地取材，采用直径为65毫米、长度为250毫米的普通钢材，顶部焊一耳环，便于用麻绳或小钢丝绳上下提动。用紫铜皮在铁蕊外部包裹一层，在其外部以普通黑色电灯线向同一旋转方向缠绕约
Electromagnetism salvage Our team in irrigation irrigation wells construction, due to drilling diameter, but also not under the mouth and tube, a little careless, it may happen to fall into the well gadget accident. How fast and good to exclude such holes within the accident? After the mobilization of the masses to discuss the use of electromagnetic iron device, after repeated use of good results, now the use of the situation are described below: Electromagnet production: We get the material, using a diameter of 65 mm, length of 250 mm of ordinary steel, Welding a top earrings, easy to use hemp rope or small rope up and down. Wrapped in a layer of copper core in the outside of the core, in its external ordinary black wire to the same direction of rotation around