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Xpansion Instruments (Popularity:  )
http://www.xinst.com/
Manufacturer of rheological equipment and products utilizing extensional rheology. Applies to solid tensile, tear, peel and friction testing of polymeric materials in physical material characterizations.
Category:
Science - Instruments and Supplies - Laboratory Equipment
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Scientific Computing International SCI (Popularity: )
http://www.sci-soft.com
Software for optical thin film design, characterization and metrology systems. Current products include: Film Wizard, Film Spectrum and Film Ellipse.
Category:
Science - Physics - Optics - Software
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Gem Hut (Popularity: )
http://www.gemhut.com/
Hundreds of descriptions for gems, minerals, and rare metals. Pictures, hardness, and composition.
Category:
Science - Earth Sciences - Geology - Rocks and Minerals
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