The tractionmachine drives car moving up and down in well.
曳引机拖动轿箱在井道内上下运行。
2
This paper introduces a cervical vertebra tractionmachine controlled by single-chip-computer (8031).
本文介绍了一种使用了单片机（8031）控制的颈椎牵引机。
3
Because of good performance and space saving, gearless permanent magnet synchronous tractionmachine is more and more widely used to drive the elevator.