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透射式肤色测试图
Transparency flesh tone test card
价格：￥0.00
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透射式彩条测试图
Transparency colour bar test card
价格：￥0.00
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反射式肤色测试图
Reflection flesh tone test card
价格：￥0.00
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反射式彩条测试图
Reflection colour bar test card
价格：￥0.00
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峰值节目电平表
Peak programme level meters
价格：￥0.00
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积分平均声级计
Integrating-averaging sound level meters
价格：￥0.00
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声级计的无规入射和扩散场校准
Random-incidence and diffuse-field calibration of sound level meters
价格：￥0.00
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标准音量表
Standard volume indicators
价格：￥0.00
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