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a relatively new silvicultural system that follows nature's model by always retaining part of the forest after harvesting. Standing trees are left in a dispersed or aggregated form to meet objectives such as retaining old growth structure, habitat protection and visual quality. Variable retention retains structural features (snags, large woody debris, live trees of varying sizes and canopy levels) as habitat for a host of forest organisms. There are two types of variable retention:
출처: www.for.gov.bc.ca/hfd/library/documents/glossary/V...
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Hard, inert material used in concrete. Fine aggregate is 1/4" or less in diameter and usually consists of sand. Coarse aggregate is 1/4" up to 1-1/2" in diameter and usually consists of crushed gravel.
출처: www.armstrong.com/commflooringna/glossary.html
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Crushed stone, gravel, or sand added to cement to make concrete.
출처: pghbridges.com/termsMas.htm
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| aggregate |
(1)an array or a class, struct, or union with no user-declared constructors, no private of protected non-static data members, no base classes, and no virtual functions. (2) A compile-time option to show the layout of a structure or union in the listing. ...
출처: www.absoft.com/Products/Compilers/C_C++/XLC/docs/g...
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A surfacing or ballast for a roof system. Aggregate can be rock, stone, crushed stone or slag, water-worn gravel, crushed lava rock or marble chips.
출처: www.roofhelp.com/glossary/
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