Originally established in 1966¼ŒHebi Boda Electronic science and technology Co., led(HBESC) is the largest produter of resistors in north China .As a high-tech enterprise of Henan province, HBESC owns a provincial level R&D center for electornic element techniques . A reliable product quality control&guaranty system is set up in the company .Inorth 2001 the company was awarded the certificate for ISO9001 quality system (Version 2000) and in 2005 it was awarded the certificate for ISO14001¼š2004 environmental management system .A number of products of the company are awarded the CQC safety certificate , including RFfused resistors , RY oxide-film resistors and RX wirewound resistors .Type RF fused resistors obtained of UL of united states and CUL of Canada. RXFwire fuse resistors obtained certificate of VDE of Germany and of Canada.