### Chinese: 我去很多奶粉的厂家，接触很多奶粉的生产线。
### English: I went to a lot of milk powder manufacturers and came into contact with a lot of milk powder production lines.
### Errors: There is a minor error of wrong grammatical register (eg, inappropriately informal pronouns). internal inconsistency (not related to terminology) at "I went to and came into contact with".

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