المواصفات القياسية لاختبار برغي لوحة البطارية
29.020 Electrical engineering in general *Including voltages, general electrical terminology, electrical documentation, electrical tables, safety, fire hazard testing, etc. *Electrical diagrams and charts, see 01.100.25 *Electrical power stations, see 27.100 *El; 29.030 Magnetic materials *Steels with special magnetic properties, see 77.140.40; 29.035 Insulating materials