I think that's what this means:

'op streep' = in a given direction (linear)
'geslepen'= ground and/or polished
'korrel' = grit size of the final grinding or polishing step

The specified grit size (200) that proobably corresponds to what is called a 'brushed finish', based on the following extract from a table in the reference listed below:

BS EN Finish Description Typical Grit
1G or 2G Ground Grit 120
1J or 2J Brushed - Unidirectional 180
1J or 2J Dull Polished – Unidirectional 240
1K or 2K Satin polished – Unidirectional 320
1P or 2P Bright polished – Non-Directional with a high degree of image clarity 600
1P or 2P Mirror Finish – Non-Directional with a very high degree of image clarity 800


[PDF] TECHNICAL INFORMATION
Stainless Steel – Surface Finishes. Introduction. Surface finish is an important ... and uni-directional texture. The surface is. normally applied to No. ...
www.aalco.co.uk/technical/datasheets/ Aalco_Datasheet_St_St_Surface_Finishes.pdf
-
Ground Grit
120
2.5 to 2.0
1J or 2J
3B
Brushed - Unidirectional
180
1.2 to 1.0
1J or 2J
4
Dull Polished – Unidirectional
240
0.6 μ
1K or 2K
5
Satin polished – Unidirectional
320
0.5 Max
1P or 2P
7
Bright polished – Non-Directional with a high degree of image clarity
600
0.1 μ
1P or 2P
8
Mirror Finish – Non-Directional with a very high degree of image clarity
800
0.05 μ

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Note added at 1 hr 11 mins (2005-07-29 15:28:52 GMT)
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That should read \'With the specified grit size, that probably corresponds...\'

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Note added at 1 hr 13 mins (2005-07-29 15:30:43 GMT)
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And further apologies for apparently pasting the table twice.