短語詞組短語gassy outburst mine 高突礦井gassy y mine 瓦斯礦highly gassy mine 高瓦斯礦井slightly y gassy mine 低級瓦斯礦second category gassy mine [礦業(yè)]二級瓦斯礦first category gassy mine 一級瓦斯煤礦low gassy mine 低瓦斯煤層very gassy mine 超級沼氣礦slightly gassy mine 低級瓦斯礦 返回 gassy mine