3WEMAN K. Health hazards caused by electromagnetic fieldsduring welding[j]. In: Svetsaren,Engl. Edition, 1999,48(1) : 14-16.
4Directive 2004/40/EC on the minimum health and safety re-quirements regarding the exposure of workers to the risks arisingfrom physical agents( electromagnetic fields) (18th individual Di-rective within the meaning of Article 16(1) of Directive 89/391/EEC)[G].Official Journal L159,30/04/2004: 1 -26.
5ICNIRPguidelines : Guidelines for limiting exposure to time -varying electric, magnetic, and electromagnetic fields[j]. In:Health Physics, 1998 , 74(4) : 494 - 522.