Requirement for reliable isolation degree of pollution 2 for boards and power section.

可靠绝缘的要求板与电源部分污染等级为2。

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The order of heavy mental comprehensive pollution degree were: NO. 2, NO. 1, NO. 3, NO. 4.3.

牧草各采样点重金属综合污染程度由大到小顺序依次2号牧场、1号牧场、3号牧场、4号牧场。

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The order of heavy mental comprehensive pollution degree were: NO. 2, NO. 1, NO. 3, NO. 4.3.

牧草各采样点重金属综合污染程度由大到小顺序依次2号牧场、1号牧场、3号牧场、4号牧场。

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