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ProfiCAD: Paint for electrical installations
ProfiCAD is designed for drawing electrical and electronic charts and diagrams. The schemes can also be used for pneumatics, hydraulics, and other types of technical diagrams.
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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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