Open are not open, but also overloaded.
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but also overloaded
但也超载了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It can turn on, bear and break normal current in circuit, but also bear and break the overloaded current within stipulated time.
它能关合、承载、开断运行回路正常电流，也能在规定时间内关合、承载及开断规定的过载电流。
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