阴极射线管用磁屏蔽钢板由阴极射线管内的电子枪发射出的电子束发射方向，受地球磁场的影响很大。因此，内部磅屏蔽钢板对地磁场屏蔽效果的优劣，对于阴极射线管性能的影响很大。对于内部磁屏蔽钢板所要求的性能，因阴极射线管用途之不同（电视，显示器等）而有所不同，有... Cathode ray tube with magnetic shield steel cathode ray tube electron gun emitted by the electron beam emission direction, greatly affected by the Earth’s magnetic field. Therefore, the internal pound shield steel plate to the pros and cons of shielding effectiveness of the Earth’s magnetic field, a great impact on the performance of the cathode ray tube. The performance required for the internal magnetically shielded steel plates varies depending on the purpose of the CRT (TV, monitor, etc.), ...