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Constructiv: Teaching material technical directions
Presentation of teaching materials for the construction sector of Constructiv for the 20 years Klascement event.
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Clipart Gallery Danger and chemical products: Dangerous and chemical products
OpenOffice.org and LibreOffice can be extended with many extensions. This free extension adds over 400 vector CC cliparts related to security. You can enlarge them without loss of quality.
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App or softwareTeacher