high gassy seam
常见例句
- Under gassy coal seam condition, the full-heading development is employed. Because of the fast heading a high rate of gas emission arises.
在瓦斯含量較大的煤層採用綜掘掘進巷道，由於掘進速度快，出現了瓦斯湧出量過大的現象。 - Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.
高瓦斯低透性煤層的瓦斯抽放，一直是煤鑛安全生産過程中的重大技術難題。 返回 high gassy seam