介绍了一种用于焊接现场的气体保护焊的自动混气设备，该设备能精确控制气体混合比例。
This paper introduced an automatic air mixing equipment for gas protection welding at work site, which can control the accurate proportion of airs.
阻火器的选用是石油化工厂、石油和天然气工厂、有可燃性气体的工厂生产安全保护和工程设计中常遇到并需解决的问题。
The selection of the fire protector is the problem faced in engineering design and production safety in the plants dealing with petrochemical material, petroleum, natural gas and combustible gas.
据美国环境保护署调查，以煤和天然气为燃料的电厂占据了美国2012年三分之一的温室气体排放量。
According to the U. S. Environmental Protection Agency, coal - and natural gas-fired plants were responsible for one-third of U. S. greenhouse gas emissions in 2012.
保护气系统：从保护气体发生站至还原退火炉的管道。
Protective gas system: pipe line from the protective gas generation station to reducing annealing furnace.
气体分离设备也在井下使用，如保护抽油设备使得不会在泵的吸入处或入口处由于游离气的分离和改变方向而发生气锁。
Gas-separation equipment is also used in downhole applications, such as the protection of pumping equipment against gas lock by separating and redirecting free gas at the pump suction or inlet.
公司具备电焊、二氧化碳气体保护焊、氩弧焊、碳弧气刨、氧气切割等特种作业人员。
Companies with welding, carbon dioxide gas shielded arc welding, argon, carbon arc gouging, oxygen cutting and other special operations personnel.
焊接中，氩作为保护气防止金属氧化。惰性气体焊接是连接几种含铁和不含铁的合金的首选方法。
Argon serves as a shielding gas to protect metals from oxidation during welding. Inert gas welding is the preferred method of joining several ferrous and nonferrous alloys.
为提高常规气电焊工艺水平，进行了保护气体质量及配比对焊缝质量影响规律的研究及气电焊辅具的研制。
In order to improve conventional GMAW process the effect of shielding gas quality and mixed ratio of different gases on welding quality are studied and useful fixtures are developed.
专门配置的旁轴气道，能满足气体保护焊和冷却工件的要求。
Special configuration, can satisfy the airway by axial gas shielded welding workpiece and cooling.
专门配置的旁轴气道，能满足气体保护焊和冷却工件的要求。
Special configuration, can satisfy the airway by axial gas shielded welding workpiece and cooling.
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