Radionuclide traceranalysis is a third important method.
第三种重要方法是同位素示踪分析。
2
The Statistical analysis of piston ring tracer cutting errors shows that there is a systematic error in the tracer cutting.
对活塞环仿形车削误差的统计分析表明：靠模仿形加工中存在系统误差。
3
The combination of enriched stable isotope tracer studies and activation analysis techniques has become an ideal and reliable technique, especially in the fields of biology and medicine.