- Add a (analytical) remark
- How do I add a variation applet (NL)?
- Embed Youtube-film
- Rules for comments
 | 18-02-2020 Jan Groeneveld: |
63.44-17 vervangen door 63.44-11.
 | 18-02-2020 Rienk van Marle: |
Gedaan 
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63.44-17 vervangen door 63.44-11. | |||||
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Gedaan | |||||