forerun

It have no the star's beauty,but can forerun the rays of light.

虽没有繁星美丽，却能预示芒！

Forerun always one step of its competitors on fabrication of coatings especially on laser system and infrared system.

滤片；纤薄膜……尤其及倍频晶体、红外晶体，紫外波段膜方面，具备优势。

Improvements on the process of light benzol forerunning are described in this paper, Practice shows that these improvements are successful.

介绍轻苯初馏生产改进。实践证明，这些改进是成功。