A real-time clock circuit(X1228)is applied to be an hourmeter, data memorizer and alarm in speedometer.

实时时钟电路（X1228）被用作里程表，数据存储器和车速表中的警报。

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A real-time clock circuit(X1228)is applied to be an hourmeter, data memorizer and alarm in speedometer.

实时时钟电路（X1228）被用作里程表，数据存储器和车速表中的警报。

youdao