plane-concave head-on photomultiplier

例句：

1. 1.The plane-concave head-on photomultiplier is used in the detection of ultraviolet radiation.
   平面凹面直视光电倍增管用于检测紫外线辐射。
2. 2. The new photomultiplier has a higher sensitivity and better resolution than the old one.
   新型光电倍增管的灵敏度和分辨率都比旧型高。
3. 3.The photomultiplier tube is a crucial component of the photographic system.
   光电倍增管是摄影系统的关键部件。