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Lightopedia   Glossary of terms

Lightopedia Glossary of terms

Glossary of Terms A En AC (Alternating Current) Electrical current in which the direction is reversed at regular intervals or cycles; in the U.S. the standard is 120 reversals or 60 cycles per second.

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Pegmatites and aplites Their genetic and applied ore geology

Pegmatites and aplites Their genetic and applied ore geology

Definition The term ore is defined in the current study to describe a concentration of non metallic, e.g., feldspar, or metallic minerals, e.g. spodumene, in pegmatitic rocks irrespective of its structure and position in the deposit which was or is currently mined for a profit.

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Numerical NAICS Code List 2017  Class Codes

Numerical NAICS Code List 2017 Class Codes

This page contains a numerical NAICS code list 2017. Users can view and lookup an index of 2017 NAICS codes in numerical order.

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Meet the Group   Primero Group

Meet the Group Primero Group

Peter has extensive structural engineering experience and is an industry leader in efficient structural design. Specialising in Structural engineering, Design Management and delivery, Design optimisation and innovation, Leader in Safety in Design

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Noble ferroalloys  ispatguru

Noble ferroalloys ispatguru

Noble ferroalloys. Ferroalloys are a group of materials which are alloys of iron that contain a high percentage of one or more non ferrous metals as alloying elements.

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Tungsten Oxide   espimetals

Tungsten Oxide espimetals

MATERIAL SAFETY DATA SHEET I. PRODUCT IDENTIFICATION. Manufacturer/Supplier. ESPI Metals. 1050 Benson Way, Ashland, OR 97520. Toll Free (800) 638 2581 * Fax (541

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Fluorescent Minerals and Rocks They Glow under UV Light

Fluorescent Minerals and Rocks They Glow under UV Light

Fluorescent minerals One of the most spectacular museum exhibits is a dark room filled with fluorescent rocks and minerals that are illuminated with ultraviolet light. They glow with an amazing array of vibrant colors in sharp contrast to the color of the rocks under conditions of normal illumination.

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Journal of weekly news and commentaries about rocks and

Journal of weekly news and commentaries about rocks and

John Betts Fine Minerals, New York, NY Dealers of Fine Minerals and Natural Crystal Clusters since 1989. Journal of weekly news and commentaries about rocks and minerals and mineral collecting

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Port Manteaux Word Maker   OneLook

Port Manteaux Word Maker OneLook

Port Manteaux churns out silly new words when you feed it an idea or two. Enter a word (or two) above and you'll get back a bunch of portmanteaux created by jamming together words that are conceptually related to your inputs.. For example, enter "giraffe" and you'll get

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Fluorescence

Fluorescence

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.It is a form of luminescence.In most cases, the emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation.The most striking example of fluorescence occurs when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible

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