merge 2 data.frames

Hello together,

i have probably a easy question, but how can i sum 2 data.frames among each
other.
I have 2 data.frames which look like this one:

        Cu.No.      place      level
1     123            London  A
2    111             Paris       B

        Cu.No.      place      level
1     333            Berlin      C
2    444             Madrid    A

and now i want this data in the same data.frame. like this one:

        Cu.No.      place      level
1     123            London  A
2    111             Paris       B
3     333            Berlin      C
4    444             Madrid    A

how can i do this.

Thanks.

Mat



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