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Keywords from Image Description:
Newtontelescoop schema. Schematische tekening van een Newtontelescoop nl br original text bewerking van org Newtonian br original text Wammes Waggel nl br original text TMoore bewerkt door Wammes Waggel bij deze gegeven Wammes Waggel original upload log page nl Newtontelescoopschema Wammes Waggel bytes no Schematische