id	domain	url
cet-14678	www.cetjournal.it	www.cetjournal.it
cet-14678	bhestore.com	https://bhestore.com/media/wysiwyg/downloads/zone_.jpg
cet-14678	www.ccpengineering.com	https://www.ccpengineering.com/areaclassification---hazardous-locations.html
cet-14678	doi.org	https://doi.org/10.1016/j.autcon.2012.02.008
cet-14678	doi.org	https://doi.org/10.1016/j.proeng.2015.08.032
cet-14678	smsenergetics.com	https://smsenergetics.com/training/electrical-classification-hazards-protection-training