1.
1. 保留:retaining valve 止回阀 | retaining 保留 | Retaliatory Tariff 报复关税
2. 固定(的):Resource node 資源點 | Retaining 固定(的) | Retribution 懲戒
3. 留用:土钉支护:the soil nailing foundation pit retaining structure (SONFOPIRS) | 留用:retaining | 护环:Retaining ring
4. retaining什么意思
4. 蓄水坝,拦水坝:reinforcing 护堤 | retaining 蓄水坝,拦水坝 | rockfill 堆石坝