1
Longitudinal
Sample was taken in a lengthways direction.
2
Transverse
Sample was taken in a crosswise direction.
3
Radial
Sample was taken originating from the centre outward.
4
Axial
A sample was taken along a line which divides a regular figure symmetrically.
5
Thickness
In the direction of the thickness of the specimen.
6
Diagonal
Sample taken in the diagonal direction.