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测量助听器耳塞机用IEC参考耦合腔
IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts
价格:¥0.00
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助听器 第9部分 带有骨振器输出的助听器特性测量方法
hearing aids Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output
价格:¥0.00
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助听器 第6部分 助听器输入电路的特性
hearing aids Part 6: characteristics of electric input circuits for hearing aids
价格:¥0.00
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驻极体传声器质量分等标准
Quality classification standard of electret microphones
价格:¥0.00
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陶瓷零件被银通用技术要求和试验方法
价格:¥0.00
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