
??? ??? ??? ???????? ?? ??? ???? ???.
??: ?????(KNO2) ??, ??, ?? ??.?? 1N NaOH? ?????.
??: ??, ??;??, ??;??? ???;?? ????? ???;?? ???;?? ???? 4-8V? ?? 5A? ??? ??? ? ??.???????? 0.1~0.2????? ??? ????.
??? ??? ??? ??????.
http://www.tungsten-carbide.com.cn/korean/tungsten-carbide-blade-bar.html

??? ??? ?? ??
? ?? ??: ???? ??? ?? ??? 3-4???? ??? ??? ????? ???.3?????? 4???? ??? ??? ??? ???? ??? ?? ??? ???.
STEP 2: ?? KNO2 ??(?? 1N NaOH)? ?? ?? ??? ??? ??? ?? ????.
3??: ?? ??? ???? ???? ????.
4??: ????? ???? ????? ? ? ????? ??? ?? KNO2 ??? ????? ?? ??? ??? ?? 2~3mm? ? ??? ???.
5??: ?? ??? ???? ??? ??? ??? ??? ???? ??? ???.
6??: ??? ???? ???? ?? ??? ??? ?? ?????.
7??: ?? ??? ??? ??? ?? ?? ?? ???? ????.
 
					 
						
		![[Korean] ??? ??? ?? ??? ?? ??? ??? ???? ??? ??? ?? ??? ?? ??? ??? ????](http://m.sscollege.cn/jp/wp-content/uploads/2025/10/yellow-tungsten-oxide-nanopowder-applied-for-heat-insulating-energy-saving-glass-picture-214x140.jpg) 
									 
									![[korean] ?? ?? ?? ??? ??? ??? ?? ?? ?? ?? ?? ??? ??? ??? ?? ??](http://m.sscollege.cn/jp/wp-content/uploads/2025/10/tungsten-oxide-nanopowder-applied-for-transparent-heat-insulation-glass-coating-picture-214x140.jpg)