HID Xenon gas lamp must operate under constant power supplying. Normally it is realized with power error detecting loop.
HID氙气灯必须工作在恒定功率条件下，通常采用功率误差检测环路来实现。
A new measuring instrument used for detecting the photometric characteristics of motor vehicular lamp is introduced.
介绍一种能够对车灯光度、色度性能同时进行在组测试的计量仪器。
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