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A 19th century architect at the drawing board. A drawing board (also drawing table, drafting table or architect's table) is, in its antique form, a kind of multipurpose desk which can be used for any kind of drawing, writing or impromptu sketching on a large sheet of paper or for reading a large format book or other oversized document or for drafting precise technical illustrations (such as ...
Traditional drafter at work A drafter in Portugal in the 1970s, using a drafting machine. A drafter (also draughtsman / draughtswoman in British and Commonwealth English, draftsman / draftswoman, drafting technician, or CAD technician in American and Canadian English) is an engineering technician who makes detailed technical drawings or CAD designs for machinery, buildings, electronics ...
Although the most common types of self-healing materials are polymers or elastomers, self-healing covers all classes of materials, including metals, ceramics, and cementitious materials. Healing mechanisms vary from an instrinsic repair of the material to the addition of a repair agent contained in a microscopic vessel.
Smaller drawing boards are produced for table-top use. In the 18th and 19th centuries, drawing paper was dampened and then its edges glued to the drawing board. After drying the paper would be flat and smooth. The completed drawing was then cut free. [3]: 1-2 Paper could also be secured to the drawing board with drawing pins [4] or even C-clamps.
Tests of the catalyst-free self-healing system have restored up to 82% of the fracture’s strength. [18] Both approaches are examples of autonomous self-healing, in which the repair mechanism is triggered by the occurrence of damage. Materials that autonomously self-repair can retain their structural integrity under stress and last longer. [18 ...
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IEC 60831 Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V; IEC 60832 Live working – Insulating sticks and attachable devices; IEC 60834 Tele-protection equipment of power systems – Performance and testing
Lutterloh-System is a pattern-drafting system intended for home pattern-cutting sewing.It was developed in Germany in the 1935 by Luise Aigenberger - later Lutterloh. Her grand-children run the company with Marcus Lutterloh and his Mother being chiefly responsible for the creation of the designs; Frank and Ralph Lutterloh run the USA and German outlets.
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