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galena crystals
meaning in English
方铅晶体
Examples
Galena crystals
detectors
方铅晶体检波器
Those were indeed the olden days so the only " active " element was a
galena crystal
grazed by a wire whisker
那确实发生在过去的岁月,所以,我唯一的“行动”是利用金属须晶轻轻擦过硫化铅晶体。
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