trunk line electrification meaning in English

铁路电气化

Directional solidified cu - cr in - situ composites have high strength , high electricity but without such problems of interfacial contamination and low stability as in the conventional man - made synthetic composites due to self - driven engender in the process of directional solidification , so this composites are expected to be used as contact cable , which is made for trunk line electrification
定向凝固cu - cr自生复合材料由于具有高强度、高导电性，同时因其在凝固过程中自动形成而避免了人工复合材料中长期存在的界面污染、稳定性差等不足，因而在电气化铁路用电车线材方面有广阔的应用前景。