The KM-4D particle wear tester is specially designed as a standard instrument based on the national standard "Method for Determination of Wear Rate of Fertilizer Catalysts, Molecular Sieve, Adsorbent, etc." (GB3636-83), "3A Molecular Sieve" (GB10504-2008), "4A Molecular Sieve" HG/2524-2011 "5A Molecular Sieve" (GB13550-92), "Test Method for Strength Determination of Wood Activated Carbon" (GB/T12496-22-90)