The helium mass spectrometer leak detecting technology for a large vacuum chamber with the complex construction is described. Some problems in operation are shown and analyzed.
叙述了复杂结构的大型真空容器氦质谱检漏应用技术，分析了其中存在的问题。
2
It is necessary to solve openning-tube sampling problem for the mass-spectrometer analysis of residual gases in sealed vacuum devices.
密封真空器件内残气的质谱分析，必须解决开管取样技术问题。
3
The domestic and foreign nodular graphite cast iron standard samples were analyzed with vacuum direct-reading spectrometer and were applied in the routine analysis.