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Find out how gas is made from oil at the oil refineries. Included is a video tour of a refinery.
Date Added: Jun 7, 2008 Hits: 1 Rating: 0.00 Votes: 0
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Date Added: Jun 7, 2008 Hits: 1 Rating: 0.00 Votes: 0
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lithuania foto alotof nice countrys foto nice pictures baltik sea lithuania foto, best place to travel, foto lithuania about lithuania, grazios lietuvos nuotraukos, lithuania foto club, lithuania foto,
Date Added: Jul 2, 2008 Hits: 0 Rating: 0.00 Votes: 0
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Amber is fossil tree resin, which is appreciated for its color and beauty. Good quality amber is used for the manufacture of ornamental objects and jewelery. Although not mineralized, it is often classified as a gemstone.
A common misconception is that amber is made of tree sap; it is not. Sap is the fluid that circulates through a plant's vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant.
Date Added: Nov 3, 2008 Hits: 0 Rating: 0.00 Votes: 0
A common misconception is that amber is made of tree sap; it is not. Sap is the fluid that circulates through a plant's vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant.
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Date Added: Nov 3, 2008 Hits: 0 Rating: 0.00 Votes: 0
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