Update textbook.en.md

0fa1b3c9 · Claude Meny · e589ce70 · 0fa1b3c9
Commit 0fa1b3c9 authored Sep 08, 2020 by Claude Meny
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textbook.en.md ...uments-characterization/01.new-course-main/textbook.en.md +2 -0

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--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/01.new-course-main/textbook.en.md
 ---
 title: 'new course : main'
+published: false
+visible: false
 ---

 new course : main
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