英语语法分析

Optocoupler, Phototransistor Output, With Base Connection.

光耦，光电晶体管输出，基地连接。

Such MSM structure can also be formed into a transverse phototransistor with its common-emitter current gain from 2 to '4.

这种结构还可以构成横向光晶体管，共发射极电流增益为2 ~ 4倍。

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。