### Chinese: 我去很多奶粉的厂家，接触很多奶粉的生产线。
### English: I went to many milk powder manufacturers and contacted many milk powder production lines.
### Errors: There is a minor error at "powder". There is a minor error at "contact". There is a minor error at "powder".

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