SIS SS 436 02 54-1980 架空线路交叉口.公共道路上最高22千伏的高压架空线.交叉杆变压器和断路器.加强型施工.交叉口跨度安全
Overhead line crossings — High voltage overhead line, max. 22 kV, above public road — Transformer and disconnector in crossing pole — Reinforced construction — Crossing sp?n safe for falling trees