single line block 单线闭塞
The row class, seen in the ingredient listing, sets a 42-pixel high block, suitable for a single line in a stack of lines inside a rounded rectangle.
您在配料清单中看到的row类将设置42像素高的块，该块适用于圆角矩形内的一叠行中的一行。
The essay discusses the effect of railway maintenance skylight on railway carrying capacity under the condition of non-automatic block in single-tracked line.
讨论在单线非自动闭塞区间条件下，铁路检修天窗对铁路通过能力的影响。
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