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。

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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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