The present invention relates to a glass ceramic which can provide a board comprising a metal substrate and the glass ceramic coated on said substrate, particularly a board comprising said board and a fine wiring pattern applied onto said board by {HEAD ~ means} of {TAIL ~ thick film printing} 
of
The present invention relates to a glass ceramic which can provide a board comprising a metal substrate and the glass ceramic coated on said substrate , particularly a board comprising said board and a fine wiring pattern applied onto said board by { HEAD ~ means } of { TAIL ~ thick film printing }
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