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It is suitable for large units or control rooms. ③ Shield clothing, shield helmet and shield eye mask. Magnetic isolation can use the following methods: ① shielding cover. A copper wire mesh or microwave absorbing material is sandwiched between the shielding suit and the shielding helmet. Used for personal protection, mainly to protect microwave workers. Use special magnetically conductive materials for magnetic isolation.

Precise electromagnetic measurement under low temperature conditions, using superconducting materials can play a complete electromagnetic shielding role. For low-frequency electromagnetic interference, it is often made of ferromagnetic materials such as iron or beryllium-molybdenum alloy to improve the shielding effect. ②Shielded room. The shielding goggles usually have a three-layer structure with pure copper strip a copper wire mesh in the middle. When the shielding requirements are low, one or two layers of fine metal mesh can be used instead of metal plates. It is generally a hexahedron made of copper or steel plate.Can't. It is suitable for small instruments or devices, generally a dense shell made of copper or aluminum.

(3) has some special mechanical properties such as excellent friction reduction and wear resistance (such as bronze and some brass), high elastic limit and fatigue limit (such as beryllium bronze, etc. There are two types of pure copper products: smelted products and processed products..; it has good thermal conductivity and is commonly used to manufacture magnetic instruments and meters that require anti-magnetic interference, such as compasses, aviation instruments, etc. See Table 1 and Table 2, respectively. (Purple copper) Pure copper is a rose-red metal, and the surface is purple after forming a copper oxide film, so industrial pure copper is often called red copper or electrolytic copper. (4) Beautiful color 2
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