Xem 1-4 trên 4 kết quả Watercraft
  • Một tàu ngầm là một tàu đi nước (Nd: watercraft) mà có năng lực hoạt động độc lập bên dưới mặt nước. Nó khác với một tàu chìm (Nd?, submersible), mà chỉ có năng lực dưới nước bị hạn chế.

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  • This document shall cover traditional lightning protection system installation requirements for the following:This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems. The purpose of this standard is to provide for the practical safeguarding of persons and property from hazards arising from exposure to lightning.

    pdf50p troidem1357 05-08-2009 344 84   Download

  • The engineering field requires an understanding of core concepts including mechanics, kinematics, thermodynamics, materials science, structural analysis, and electricity. Mechanical engineers use these core principles along with tools like computer-aided engineering and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, and others.

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  • The rising incidence of invasive species displacing endemics and altering water chemistry and local foodwebs increasingly affects freshwater systems and should be considered a water quality problem (Carr and Neary 2008). Aquatic species have in many cases been introduced deliberately into distant ecosystems for recreational, economic, or other purposes. In many instances, these introductions have decimated endemic fish and other aquatic organisms, and they can also degrade local watersheds.

    pdf50p saimatkhauroi 01-02-2013 17 2   Download

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