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声频功率放大器能效限定值及能效等级专业用D类
Minimum allowable value of energy efficiency and energy grade of audio power amplifiers.Professional class D
价格:¥0.00
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有源音箱产品质量监督抽查实施规范
价格:¥0.00
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有线电视系统双向放大器技术要求和测量方法
Specifications and methods of measurement on two-way amplifiers used in CATV systems
价格:¥0.00
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φ200mm电磁式扬声器技术条件
价格:¥0.00
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扬声器系统电声参数测试方法(暂行)
价格:¥0.00
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有线电视系统模拟光纤放大器技术要求和测量方法
Specifications and methods of measurement on analog optical fiber amplifiers used in CATV system
价格:¥0.00
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