运行平稳，无噪音，且无磨损。
Stable operation, free of noise and abrasion.
youdao
无需维修，无磨损，耐老化。
No maintenance, no wear, ageing resistance.
无噪音、无磨损、运行可靠、维护方便。
No noise, no wear and tear and operational reliability, ease of maintenance.
应用推荐
模块上移
模块下移
不移动