This will allow gas to escape during welding.
这将使天然气逃脱焊接过程。
The fracture during ER70S-6 wire rod drawing of gas shield welding wire steel is analysed.
对ER70S - 6气保焊丝钢在拉拔过程中的断裂问题进行分析。
The experiment of the gas pressure welding of carbon steel rail was carried out.
对碳钢钢轨气压焊进行了试验研究。
Safety Regulation on Welding Technology for Gas …
燃气用聚乙烯管道焊接技术安全规程。
Safety Regulation on Welding Technology for Gas …
燃气用聚乙烯管道焊接技术安全规程。
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