1·The average coal seam here is three feet thick.
这里的煤层平均为3英尺厚。
—— 《柯林斯英汉双解大词典》
2·The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.
构造作用是控制井田范围内煤层厚度变化的主要地质因素。
3·Due to the coal seam particularity in Shendong Coal Mine, cracks appear at the radial seat of Eickoff SL500 shearer.
由于神东矿区煤层的特殊性，在使用艾柯夫公司SL500型采煤机时，摇臂座出现了裂缝。
4·Discussed the control factors forming hydrate in coal seam, and analyzed the characteristic of gas hydrate formation and decompose by experiment observe.
探讨了在煤层中瓦斯水合物生成的控制因素，并通过实验观察分析了瓦斯水合物生成和分解的特性。
5·The distribution patterns of underground coal seam is diversified. The plane distribution is only one of the simple curved surface distribution patterns.
地下开采煤层的分布形式多种多样，平面分布仅是曲面分布形式中的一种简单情况。