berkefeld filter वाक्य
"berkefeld filter" हिंदी में berkefeld filter in a sentenceउदाहरण वाक्य
- Some of the first Berkefeld filters were used during the 1892 cholera epidemic in Hamburg.
- A "'Berkefeld filter "'is a water filter made of diatomaceous earth ( " mine in Hanover, Germany, where the ceramic material was obtained.