双传动 meaning in Chinese

dual drive
twin drive
twindrive

The wall - tie is changeable by adjusting the thread rods , so it meets the needs of different wall - tie length at each section the max . length is 12m . its drivng device is provided with parallel two or three drives , and the cage can be with or without cabin for driver
附墙支撑具有可变段和螺杆调整，适应各道附墙长度不同的要求最大附墙距离12米，传动机构有并联双传动或三传动两种供货形式，吊笼可以有驾驶室或无驾驶室。