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percussion drill meaning in Hindi
sound :percussion drill sentence in Hindi
Examples 1. You must use special percussion drill bits for this operation. 2. In 1849, Couch's assistant, Joseph W . Fowle, filed a patent caveat for a percussion drill of his own design. 3. The commissioned stonemason used percussion drills to get the iron pins out that held the pieces of the granite together. 4. The percussion drill is designed to go down to and collect cemented ice samples for an onboard miniaturised laboratory called ProSPA. 5. The first " percussion drill " was made in 1848 and patented in 1849 by Jonathan J . Couch of Philadelphia, Pennsylvania.
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