### Chinese: 我去很多奶粉的厂家，接触很多奶粉的生产线。
### English: I <v>went to</v> many milk powder manufacturers and came into contact with many milk powder production lines.
### Errors: There is a minor style/awkward error at "went to" within <v></v>.

### Improved English: I have visited many milk powder manufacturers and gained contact with many production lines of milk powder.
