perforated disc इन हिंदी

perforated: चालनी पट्टिका

disc: चक्र चक्रिका

	1.	Here, a cylindrical chamber of fluid filled with a stack of perforated discs rotates with the normal motion of the output shafts.
	2.	Player piano rolls and music box perforated discs were also used at the time to play Foster's music, although these are not part of the collection.

अंग्रेज़ी→नहीं। नहीं।→अंग्रेज़ी