UL 122001-2014 I级, 2分区或者2区, 危险 (分类) 位置处内燃机电气点火系统的通用要求的UL安全标准 (第一版)
UL Standard for Safety General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I@ Division 2 or Zone 2@ Hazardous (Classified) Locations (First Edition)