手工抛光的 meaning in English

hand-polished

Based on the status that manual polishing is required after numerical control processing in our aviation turbine engines and steam turbine titanium alloys blade , the subject makes strengthening and polishing in workpieces with complicated strange curved surfaces possible by using a unique resonance processing technology
基于我国航空涡轮发动机和汽轮机钛合金叶片数控加工后仍需手工抛光的工艺现状，本项目采用独特的共振加工技术使复杂空间曲面零件的强化抛光成为可能。