high gassy seam

常見例句

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采用綜掘掘進巷道，由于掘進速度快，出現(xiàn)了瓦斯涌出量過大的現(xiàn)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，一直是煤礦安全生產(chǎn)過程中的重大技術難題。

感谢您访问我们的网站，您可能还对以下资源感兴趣：

_{<dd id="9kzx8"></dd>}