percussion hammer वाक्य

उदाहरण वाक्य

1. Between 1807 and 1810, Lepage invented a new way to fire portative firearms, by using the mercury fulminate priming medium to be fired by the blow of a percussion hammer.
2. Doheny brought in a sharpened eucalyptus log and used it as an improvised percussion hammer to deepen the well, and shortly afterwards they punctured an oil reservoir, and began producing about seven barrels a day.