Create new elements custid, total, and name under the ranking element.
在ranking元素下面创建新元素custid、total和name。
The switch apparatus is a key element for total electric power system in reliability.
开关电器是整个电力系统工作可靠性的关键元件。
The switch apparatus is a key element for total electric power system in reliability.
开关电器是整个电力系统工作可靠性的关键元件。
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