... including 4 nondestructive testing inspectors all with level 3or 2 certificate who can do UT,MT and PT,etc ... conforming to ISO9001 by IAF,welding quality system audited conforming to ISO3834-2 by IIW,manufacturing approval by DNV and ... lot of clients both home and abroad.the part os products have been exported to EUROPE and AMERICA,JAPAN ... sales is USD5,000,000.00. ISO9001 ISO3834-2 dust-free coal charger