The phototransistor was installed through holes in the top of the case, and enclosed in a brass tube that was painted black inside and out.
该光敏三极通过安装在洞方的情况下,密封在一个黄铜,手绘的色内。
The phototransistor was installed through holes in the top of the case, and enclosed in a brass tube that was painted black inside and out.
该光敏三极通过安装在洞方的情况下,密封在一个黄铜,手绘的色内。
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