The traditional ballast starting, added high-pressure filament material suddenly without preheating, will take serious sputter and loss, and make the light turn black and scrap ahead of time.

传统的镇流器启动，未经预热突加高压灯丝材料会发生严重溅射损耗，导致灯管提前发黑报废。

youdao

The selection of macromolecular elastic material, model design and production, and the producing technics of ballast padding plate for urban rail are analyzed and evaluated.

对城市铁路轨道道碴垫层研制从高分子弹性材料选择、模具设计加工及生产工艺三方面进行了分析与评价。

youdao

Lower turbines should, together with clever design and material selection, help reduce the turbines' weight, and thus their need for ballast, which in turn should reduce sub-sea costs.

BBC: Floating challenge for offshore wind turbine