coal ball वाक्य

उदाहरण वाक्य

1. Coal balls have been found that were smaller than a thimble.
2. In coal seams, coal balls are completely surrounded by coal.
3. Coal balls usually do not preserve the leaves of plants.
4. Coal balls were formed in turned into stone instead.
5. Coal balls may be found in coal seams across North America and Eurasia.
6. In 1962, Sergius Mamay and Ellis Yochelson analysed North American coal balls.
7. European coal balls are generally from the early end of the Westphalian Stage.
8. This embeds the cells preserved in the coal ball into the cellulose acetate.
9. Nitric acid, and then acetone, are applied to the coal ball.
10. Up to 50 peels can be extracted from of coal ball with this method.