messenger wire meaning in English

承力吊索
悬缆线

Fittings for overhead contact system of electrification railway - part 2 : dropper clamp for messenger wire
电气化铁道接触网零部件第2部分：承力索吊弦线夹
Fittings for overhead contact system of electrification railway - part 3 : clamp for headspan cross messenger wire
电气化铁道接触网零部件第3部分：横承力索线夹
Fittings for overhead contact system of electrification railway - part 29 : connection clamp for messenger wire
电气化铁道接触网零部件第29部分：承力索接头线夹
Fittings for overhead contact system of electrification railway - part 6 : mid - anchor clamp for messenger wire
电气化铁道接触网零部件第6部分：承力索中心锚结线夹
Fittings for overhead contact system of electrification railway - part 4 : clamp for double headspan cross messenger wire
电气化铁道接触网零部件第4部分：双横承力索线夹