当铺设，电路板被放置在子层的挤压，它在整个结构的跨度运行。
When laid, the boards are positioned on the sub-floor extrusion, which runs across the span of the structure.
当铺设一条从欧洲到美洲的海底电报光缆的时候，出于商业冬季人们第一次提出“海底是什么东西？”
The first transatlantic telegraph cable is completed, and messages begin to flow between the shores of America and Europe.
当铺设一条从欧洲到美洲的海底电报光缆的时候，出于商业冬季人们第一次提出“海底是什么东西？”
The first transatlantic telegraph cable is completed, and messages begin to flow between the shores of America and Europe.
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