wax engraving इन हिंदी

wax: खोंट मोम मोमबत्ती

engraving: खुदाई नक्काशी

	1.	The first Rand McNally map, created using a new cost-saving wax engraving method, appeared in the December 1872 edition of its " Railroad Guide ".
	2.	Johnson began experimenting with melted down Edison cylinders in an attempt to bring the sonic benefits of the Bell-Tainter method of wax engraving to lateral-cut gramophone discs.

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