The transistor will do most of the things a triode tube will do. 晶体管能起三极管所能起的大部分作用。
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. 该光敏三极管是通过安装在洞上方的情况下，密封在一个黄铜管，这是手绘的黑色内。
