obscuration-type photoelectric smoke detector是什么意思

用法例句

The Implementation of the Control System of Precision Stepless Dimmer on the Upper Stage Computer;

精密无级减光器控制系统的上位机实现

In this paper,the structural principle of precision stepless dimmer and the design process of controlling it with application of PLC are introduced.

介绍了精密无级减光器的结构原理以及应用PLC对其进行控制设计的过程。

The test of transmittance of dimmer glass by photoelectric effect, and the application of calibrated dimmer glass in testing the photosensitivity of photoresistor are introduced.

介绍了用光电效应测试减光片透光特性的方法以及用准确标定后的减光片对光敏电阻的光照特性进行测试的一个应用。