gas pulling out

• 瓦斯抽放

gas pulling out的用法和样例：

例句

1. Research result shows that controlling blasting technique is feasible to improve gas drainage under suction in hardness and low dialyzing coal bed.
   研究表明，该技术用于坚硬低透气煤层，提高矿井瓦斯抽放率是可行的。