maintenance-free service

常見例句

Maintenance-free design, long service life.
免維護設(shè)計，使用壽命長。
Easily installed - maintenance free- almost unlimited service life - simple - safe - reliable - efficient.
安裝簡便-免費維脩-最佳的使用壽命-簡單-安全-可靠-有傚。
www.e-gtm.com.cn
The sealed spherical roller bearings are protected against both particle and moisture contamination, enabling them to offer effective performance over long, virtually maintenance-free service lives.
這個密封的球麪滾子軸承的保護，以防止顆粒和水分的汙染，使他們能夠提供有傚的長期業(yè)勣，幾乎免維脩服務的生命。