- 维护: safeguard; defend; uphold; k ...
- 轮换: rotate; take turns; alternat ...
- 轮换: rotate; take turns; alternate 定期轮换 take turns according to a fixed schedule; 这个车间的工人上白班和上夜班每周轮换一次。 the workers in this workshop do day and night shifts in weekly rotation.; 轮换牧地 rotation pasture; 轮换栽培 alternation of culture; 轮换种植 shifting cultivation
- 防护轮: guard sheaver
- 护轮板: wheel guard
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