基本解釋[鑛業(yè)] 瓦斯煤層英漢例句雙語(yǔ)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(cǎi)用綜掘掘進(jìn)巷道，由於掘進(jìn)速度快，出現(xiàn)了瓦斯湧出量過大的現(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，一直是煤鑛安全生産過程中的重大技術(shù)難題。gassy seam更多例句詞組短語(yǔ)短語(yǔ)gassy y seam 瓦斯煤層thick gassy coal seam 含瓦斯厚煤層high gassy coal seam 高瓦斯煤層high gassy seam 高瓦斯煤層gassy seam mining method [鑛業(yè)]瓦斯煤層採(cǎi)煤法gassy seam更多詞組專業(yè)釋義地球科學(xué)瓦斯煤層