试验探棒还需穿过在表面覆盖一层非导电涂层如瓷釉或清漆的接地金属外壳的开口。
The test probe is also applied through openings in earthed metal enclosures having a nonconductive coating such as enamel or lacquer.
即缺陷接地结构，它是近年来提出的一种在微波平面电路接地版上刻蚀出非周期形状的结构。
Defected ground structure (DGS) is a nonperiodic structure proposed in recent years, which means machining various shapes of etching on the ground plane.
为了降低电压表的非欧姆接触所产生的误差，采用屏蔽和适当的接地措施来降低交流干扰。
To reduce error due to voltmeter non-ohmic contacts, use shielding and appropriate grounding to reduce ac pickup.
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