1)nongassy,无瓦斯的2)open light mine,无瓦斯矿3)gaseous,瓦斯的4)gassy,含瓦斯的5)gassy,含瓦斯的［能］6)finite gas flow field,无限瓦斯流场
用法例句
The respective gas emission laws of infinite and finite gas flow field were studied, and then the prediction method of gas emission quantity suitable for double tunneling was proposed.
