gas content in coal seam

例句：

1. 1. The mine isproducing high gas content coal.
   该矿正在生产高瓦斯含量的煤炭。
2. 2.The gas content in the coal seam has been reduced significantly.
   煤层中的瓦斯含量已经显著降低。
3. 3. The gas content in the coal seam is a critical factor in determining the safety of mining operations.
   煤层中的瓦斯含量是决定采矿作业安全的关键因素。