"Ona ma drewniane łóżko."

Translation: She has a wooden bed.

[bluthbanana87]

Does łóżko refer more to the mattress or the bed frame?

[immery]

usually both (together). In this sentence it is clearly a frame, when you buy an item -might be a frame, or a whole thing better check. A mattress without a frame in not really "łóżko".

[Euhan1]

Ona ma drewniany materac...

[Mariolado]

Doesn't accept "She has GOT a wooden bed" as a correct sentence.

[Jellei]

That's an oversight, added.