平行光管是光学实验及计量检测的重要设备。
The collimator is an important equipment for optical experiment and standardization.
光学组件包括第一光管、第二光管及第三光管。
Optical module includes first light pipe, second light pipe, and third light pipe.
光学组件包括第一光管、第二光管及第三光管。
Optical module includes first light pipe, second light pipe, and third light pipe.
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