内侧打开小型拖链满足电线电缆两端接头大于电线电缆直径的穿线要求，轻便低噪音、速度快，广泛应用于工业设备自动化、医疗、自动门机系统等领域。
Inside bar can pen cable chain, it can meet the requirements of threading cable with both end connectors larger than the diameter of cable. It is light, low noise and fast. It is widely used in industrial equipment automation, medical treatment, automatic door machine system and other fields.