Hazardous Area Classification/ Flameproofing Dostupné online http://www.hse.gov.uk/comah/sragtech/techmeasareaclas.htm http://www.hse.gov.uk/comah/sr.../techmeasareaclas.htm http://www.hse.gov.uk/comah/sragtech/techmeasareaclas.htm http://www.hse.gov.uk/comah/sr.../techmeasareaclas.htm http://www.hse.gov.uk/comah/sr.../techmeasareaclas.htm