Helium is used for arc welding and leak detection, mostly, although NASA USES it to pressurize space shuttle fuel tanks.
虽然美国宇航局用它来给航天飞船的燃料箱加压，氦主要还是用来做弧焊和裂纹检测。
A graphic image for the detection of line and arc of the C-language source code.
一个用于检测图形图像中直线以及弧张的C语言的源代码。
This paper gives an example of weld-seam correction system of arc robot. It analyzes the principle of weld-seam correction and welding signal detection.
本文以弧焊机器人的焊缝纠偏系统为例，分析了焊接纠偏以及焊接信号检测的原理。
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