glass staining trough 玻璃染色槽
He designed a system based on five large reflectors, each 62 metres long and made of glass mirrors arranged to form a trough in the shape of a parabola.
基于5个大型反光器，他设计了一个玻璃镜子。每个反光器长62米，用玻璃镜子制作而成。
Of working cold trough: stainless steel cold trough, the double-layer vacuum glass observation window.
工作冷槽：不锈钢冷槽，双层真空玻璃观察窗。
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