高温（大于482EC）加速计，推荐用endevco2248型或PCB357B61型或同等产品。


你看这行不。

E是国际单位制词头，E表示exa，exa是穰(=10的18次方)，C表示温度，所以EC是10的18次方摄氏度。

这是我查的，不知道对不对。

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