营业线有砟轨道 500m长轨装、运、卸施工技术
Track business lines are 500m long rail loading,
transportation and unloading of construction technology
Yang Qing-yong
(China Railway First Group/New Railway Laying Co. ,
LTD Xianyang Shanxi 712000)
【】500m long rail loading, transportation and unloading
of railway engineering and passenger line ballasted track
construction of the key, difficult and critical
techn