1. It is all still there, like petroleum under the covering layers of rock. 2. Initially, the caps are covered by a peridium an outer covering layer of tissue. 3. Wounds in the mutated mice form a covering layer of skin faster, she said. 4. Eventually erosion removes the covering layer . 5. However, they fall short of being ovules, since the nucellus, an inner spore-covering layer , does not completely enclose the spore. 6. In some specimens, four layers of collagen are visible, the fibres of the covering layers crossing those of the collagen below. 7. Eventually, the heat from the deep subsurface together with the insulating qualities of the covering layer produced a thick water layer. 8. It is not possible for ordinary horses to go all over the universe and then enter into its outer covering layers . 9. Notable revisions to the 2012 edition include a new chapter on Grooved Metal Gaskets with Covering Layers and updates to material tables ." 10. Submerged arc welding ( SAW ) is a high-productivity welding method in which the arc is struck beneath a covering layer of flux.
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