{TAIL ~ Suitable carbides} include, but are not limited to, chromium carbide, titanium carbide, tantalum carbide, niobium carbide and {HEAD ~ zirconium carbide} 
{ TAIL ~ Suitable carbides } include , but are not limited to , chromium carbide , titanium carbide , tantalum carbide , niobium carbide and { HEAD ~ zirconium carbide }
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