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		[Know Tungsten] Appearance Quality Standard for Ammonium Metatungstate		
        
		
		
		
		
        
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        According to 'GB/T 26033-2010 Ammonium Metatungstate', the appearance quality standard for ammonium metatungstate is that the product appears as a white powder or light yellow crystals, with no visible foreign matter or lumps upon visual inspection.
        
			
										
								
				
        
	
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