区别就是两者都是前缀+名词calibration，前缀不同，意思也不同，具体的不同如下
pre calibration中文意思是预校准
The working principle of KZDL -3fast sulphur determination device is pre sented. Its calibration method and notable matters in application are described by using examples.
post calibration中文意思是测后检定
This technique consists of seismic post-stack processing， multivariate composite calibration， fine description of fault blocks， reservoir prediction and overall evaluation of fault blocks.
