Research about examination testimony of a witness of internal Onboard signal equipment

국내차상신호설비의 시험에 관한 연구

Railroad business had repeated continuous development. Is developing old line improvement skill that technique aging of railroad and hangup of transport capacity decline are happened and minimum expense is spent. Developed skill and equipment are important and examination and by this are important. Therefore, examine skill and examination formality of equipment, examination item, examination kind etc.. developed serving speed elevation of old line in treatise.