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\"\"<\/figure>\n\n\n\n

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\"\"<\/figure>\n\n\n\n


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\"\"<\/figure>\n\n\n\n

\u6c34\u6676\u63a2\u5934\uff08\u6676\u4f53\u63a2\u5934\uff09<\/p>\n\n\n\n

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5~15MHZ<\/p>\n\n\n\n

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15\uff5e25MHZ<\/p>\n\n\n\n

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25\uff5e50MHZ<\/p>\n\n\n\n

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50\uff5e75MHZ<\/p>\n\n\n\n

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75MHZ\u53ca\u4ee5\u4e0a<\/p>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

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