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Helicopter's History Site (Popularity: )
Traces the evolution of rotary wing aircraft back to Leonardo da Vinci, with many photographs.
Category: Science\Aeronautics and Aerospace\Aviation
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Water Online (Popularity: )
For water and wastewater professionals. Industry news, regulatory updates, latest technology announcements and employment opportunities
Category: Science\Environment\Water Resources
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Water Online: Virtual community for the water industry (Popularity: )
Daily news and product updates for professionals in the wastewater industry- Information on manufacturing, technology, ...
Category: Science\Technology\Sanitary Engineering
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Key Solutions, C.A. (Popularity: )
Venezuelan company providing a complete line of products, equipment and services for prevention, control and ...
Category: Science\Environment\Products and Services\Spill Containment and Prevention
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Photon Technology International Inc. (Popularity: )
A UK manufacturer of fluorescence instrumentation, including imaging systems, fluorimeters, photometers, microscope systems, and time ...
Category: Science\Physics\Optics\Equipment and Instruments
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How Helicopters Work (Popularity: )
Photos and many brief videos in this narrative help to describe helicopter controls, capabilities and ...
Category: Science\Technology\Aerospace\Aeronautics
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Helicopter History Site (Popularity: )
This site traces the evolution of rotary wing aircraft back to Leonardo Da Vinci.
Category: Science\Technology\Aerospace\Aeronautics
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