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网站简介：A magazine for applied electronics, automation, programming, information and other new technologies. For hobbyists and professionals.
网站简介：Electronic Publications; Page charge for authors and per downloaded article charge for readers.
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网站简介：Guide to food safety and quality and health and nutrition for a balanced diet and healthy lifestyle
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网站简介：As part of the CDC, NIOSH is the main US federal agency responsible for conducting research into occupational safety and health matters, as well as for investigating work-related hazards, and the carrying out of educational, training and information activities in the field. Bilingual site (English and Spanish).
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网站简介：Produces a wide range of semiconductors including programmable logic devices, memory, chipsets and networking ICs.
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网站简介：Regulatory agency for nuclear power production and other civilian uses of nuclear materials. This site has been considerably scaled back due to security concerns following the terrorist attacks of 9/11/01.
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网站简介：information on the subjects of defence, geopolitics, transport and police.
网站简介：Independent watchdog established to protect the public's health and consumer interests in relation to food safety. Provides information on a variety of food-related issues including health, safety, hygiene and nutrition.
网站简介：Analyzer and charger maker offers web version of book about batteries and how to charge them.
网站简介：Activities, news, product recalls and other consumer information, publications, educational programs and details of the organization.
网站简介：A free online materials information resource with properties data on over 54,000 materials. Search for materials by name or properties. Database includes comprehensive coverage of thermoplastic and thermoset polymers, aluminum, cobalt, copper, lead, magne
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