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Nook Industries manufactures linear actuators for the motion control industry. We offer: ball screws, acme thread screws, worm gear screw jacks, linear slide systems, lead screws, electric cylinders, linear guide components and more.

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AST Bearings is a premier supplier of high-precision, miniature, and industrial ball bearings, roller bearings, bushings, and related bearing services.

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Free Online Library: One of the largest online libraries in the world -- Millions of news, trade publications, newspapers, magazine, journal and reference documents on business, communications, entertainment, health, law, government, politics, scienc...

Cadyou is a free resouce for creative commons licensed 3D Models, CAD Blocks and Textures

2learnCAD is a free tutorial site that teaches beginners how to use Autocad. It includes free blocks, symbols, tips, and more.

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archinoah.com is a architecture network for architects, interior architects, urban planners, engineers and students of these branches.