对要求接地屏蔽的外壳，应用可焊性好的金属材料或铵层。
On requirements of grounding shielding enclosure, using good solderability of metallic material or layer of ammonium.
高压变电所内屏蔽电缆屏蔽层的正确接地，对降低外部电磁场对微机型二次设备的干扰水平，起着重要作用。
The proper earthing of the shielded layer of cable in HV substation plays an important part in reducing electromagnetic interference to the microcomputer-based secondary facilities.
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