butt contact line abrasion ratio
Fujian coastal line area
overhead contact line equipment
three-phase contact line
contact area
接触面
触点面积
牙齿接触点
接触表面
接触区
受力面积
接触
接触面积
接触区域
螺栓
压印面积
contact area of molten pool
elastic contact area ratio
A line used as both sterile and maintaining line