继电器往往会以开关时间规定一个重复率，或者说是工作频率，使用时需低于该值。
A repetition rate, or operating frequency, lower than that allowed by the switching times is often specified for a relay.
继电器往往会以开关时间规定一个重复率，或者说是工作频率，使用时需低于该值。
A repetition rate, or operating frequency, lower than that allowed by the switching times is often specified for a relay.
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