图4-2 双斜井单水平开拓的翻译：4-2 double-inclined single level open up 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Figure 4-2 pairs of inclined single-level development

4-2 double-inclined single level open up

Figure 4-2 pair of slant hole single level development

Figure 4 - 2 double-talked single level open up

4-2 double-inclined single level open up