| 4-Word | 提取的词组 |
| Electrochemical/machining/process/engineering/ | Electrochemical machining process engineering |
| machining/process/engineering/remove/ | machining process engineering remove |
| process/engineering/remove/materials/ | process engineering remove materials |
| engineering/remove/materials/anodic/ | engineering remove materials anodic |
| remove/materials/anodic/dissolution/ | remove materials anodic dissolution |
| materials/anodic/dissolution/metal/ | materials anodic dissolution metal |