光敏三极管与发光二极管沿径向安装于端盖上形成测量头。

The phototransistor and the light emitting diode are arranged on the end cover along a radical direction to form a measurement head.

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以光敏二极管和光敏三极管的伏安特性作为设计实验的基础。

The volt-ampere characteristic property with photodiode and photosensitive audion is the basis designing an experiment's.

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光敏三极管另一个优点，他还可以接受红外线，我认为这点很有用处。

Another merit, he return photosensitive audion back being able to accept infrared ray, I think that this is of use very much.

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