The welding of electronics parts also produces toxic gases, but management refuses to turn on the ventilation system, except when safety inspectors are present.

焊接电子部件还会产生有害气体，但管理人员拒绝打开通风设备，安全检查人员在场的情况下除外。

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Because of the high activeness of the titanium alloys, the inert gases or vacuum shielding is needed in fusion welding.

由于钛合金的活性强，熔化焊时需要用惰性气体或真空进行保护。

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This paper illustrates the applications of mixed gases in GMAW and analyzes the different proportion of shielding gas impacts on the welding technics performance and quality in GMAW.

阐述了混合气体在熔化极气体保护焊中的应用现状，分析了保护气体成分的不同配比对熔化极气体保护焊的焊接工艺性能、焊接质量的影响。

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In the early 1900s Adolf Messer, the founder, quickly moved from gas lamps, suspecting that electricity would do the job better, to making welding equipment and industrial gases.

ECONOMIST: Face value