United States Frequency Standards
... United States Fleet 美国舰队 United States Frequency Standards 美国频率标准 United States gallon 美国加仑 ...
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美国频率标准(ANSI frequency standards)翻译目录查询 ANSI S1.6-1984 声学测量的优先选择频率、频率级和频带数 Preferred Frequencies, Frequency Levels, and Band Num...
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短语
美国标准频率
united states frequency standard
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united states frequency standards
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united states frequency standards
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united states frequency standard
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