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| ATSC - Advanced Television Systems Committee |   | |
| Hebei Energetic-Ox Motor Group |   | ||
| CSA International |   | ||
| Eng-Tips Forums for engineering professionals |   | ||
| Control Engineering Virtual Library |   | ||
| The GoRobotics Network |   | ||
| Library of Congress, The |   | ||
| iRobotWorld - Online Magazine For Robots-Robotics |   | ||
| NTSC - National Television System Committee |   | ||
| Reconn's World |   | ||
| SemiWeb |   | ||
| Think & Tinker, Ltd. |   | ||
| ArcOne Welding Glossary |   | ||
| Doknet |   | ||
| Hardware Central Tutorials |   | ||
| Micro Dynamics Corporation 6201 Bury Drive - Eden Prairie, MN 55346 USA |   | ||
| NIST Reference on Constants, Units, and Uncertainty |   | ||
| U.S. Patent & Trademark Office PK3-Suite 441 - Washington, DC 20231 USA |   | ||
| U.S. Patent & Trademark Office - Patents PK3-Suite 441 - Washington, DC 20231 USA |   | ||
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