The order numbers (e.g. 18-40) of the available sample materials are always structured according to the scheme "yy-id. Here yy stands for the year of use of the sample material and id. stands for the identification number of the corresponding PT.
The order numbers (e.g. 18-40) of the available sample materials are always structured according to the scheme "yy-id. Here yy stands for the year of use of the sample material and id. stands for the identification number of the corresponding PT.
