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Circuit breaker including forced contact parting mechanism capable of self-retaining under short circuit condition
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Magnetically controlled reed switching device
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Electric circuit breaker
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使开关设备安全工作的方法和装置
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電磁継電器
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Heavy duty relay with wiping contacts
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Reed switch
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Permanent-magnet display signal
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釈放形電磁装置
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Unitized combination starter
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電磁スイッチ装置
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Electromagnet.
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Magnetic controlling mechanism
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Circuit interrupter
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