... back-scattering gauge 反向散射测量计 back-scattering thickness gauge 反向散射厚度计 back-silvered mirror 背面镀银[反射]镜 ...
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... 反向散射[的] back-scattering gauge 反向散射测量计 back-scattering thickness gauge 背面镀银[反射]镜 back-wall photovoltaic cell ...
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