履带牵引 meaning in Chinese

caterpillar traction
crawling traction

The drill is mounted on and propelled by individually controlled and individually powered crawlers
爆破钻安装在单独控制和单独提供动力的履带牵引装置上，并由其推进。
The complete configures of equipment : mono - screw lining extrusion system , cooling device , pedrail haul - offs , gauzing machine , mono - screw outer extrusion system , pedrail haul - offs , gauzing machine , automatic stacking machine
整套设备配置:单螺杆内层挤出系统，冷却装置，履带牵引机、包纱机、单螺杆外层挤出系统，冷却装置，履带牵引机、自动收卷系统。