service + To maintain a piece of machinery so it runs well ☊ mechanism + piece of machinery ☊ New HSK word(s):
Old HSK word(s):
Grade E word(s):
| Gb | Eng | Viet |
|---|---|---|
service + To maintain a piece of machinery so it runs well ☊ mechanism + piece of machinery ☊ | Gb | Eng | Viet |
|---|---|---|