Based on the new viewpoint of the interaction between solid deformation and gas leak flow, the mechanism of gas leakage in double deformable coal seam can be understood.
应用煤岩体变形与煤层气(瓦斯)越流相互作用的新观点，研究了双层系统煤层气越流运移的机理。
Several technical features are associated to the new torch design such as an automatic electrode change, a double flow gas nozzle and a push pull wire feeder.
与该焊枪相关联的几个技术特征有：自动更换钨电极、双气流喷嘴和推拉丝送丝机构。
Several technical features are associated to the new torch design such as an automatic electrode change, a double flow gas nozzle and a push pull wire feeder.
与该焊枪相关联的几个技术特征有：自动更换钨电极、双气流喷嘴和推拉丝送丝机构。
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