In order to make the TVOC measurement results comparable, its standard definition and analytical method is given.
为了使测得的TVOC结果具有可比性，本文给出了TVOC的标准定义和分析方法。
2
It introduces the definition and sources of uncertainty in measurement.
介绍了测量不确定度的定义、来源。
3
A new definition and measurement method of damage is put forward, the damage critical value of metal is determined and it is proved that damage of metal is exactly the plastic change of metal.