relay core
... relay coordination ==> 保护配合整定 relay core ==> 继电器铁芯 relay cover ==> 继电器罩 ...
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继电器铁芯套管 relay sleeve
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电气线路中多采用带铁芯的电感线圈如变压器、继电器等。
Most of iron-core inductance coils are used in electrical circuit, such as transformer, relay, etc.
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