... 共地面点 common-ground-point ; CGP 地面主点 ground principle point 地面锤直点 Point ground plumb ...
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The paper introduces the principle of LD-3 rotor one-point grounding relay that measures the admittance against the ground.
介绍测量对地导纳原理的LD 3型发电机转子一点接地继电器的保护原理。
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